Saturday

April 19, 2014

April 19, 2014

Number of results: 61,764

**math probability**

this is a probability question... Suppose you are asked to choose a whole number between 1 and 13 inclusive. (a) what is the probability that it is odd?...7/13 (b) What is the probability that it is even?...6/13 (c) what is the probability that it is a multiple of 3?...4/13 (d...
*Thursday, December 18, 2008 at 12:22am by joe*

**Probability**

A popular game show begins with the host reading a question to the contestants. One question involves putting four events (A, B, C and D) in chronological order. What is the probability that the contestant gets the question correct if he or she just guesses?
*Wednesday, March 24, 2010 at 4:44pm by Sandy*

**Statistics**

On a very short quiz, there is one multiple choice question with 5 possible choices (a, b, c, d, e) and one true or false question. Assume you are taking the quiz but do not have any idea what the correct answer is to either question. You mark an answer to each question anyway...
*Friday, July 8, 2011 at 2:47pm by Cassie*

**College Mathematics**

This is a repost. I posted a question 2 days ago and the response was wrong. The question was on Probability. The question was One card is selected from a deck of playing cards. Determine the probability of selecting a jack OR a club. use this rule P(A or B) = P(A) + P(B) - P(...
*Tuesday, March 12, 2013 at 1:10pm by slomomo*

**math**

I do not know how to answer this question. Would someone please help me with each of the four question below? Thank you. Question 1. Write the sample space for the outcomes of tossing three coins using H for heads and T for tails. Question 2. What is the probability for each ...
*Thursday, February 17, 2011 at 7:57am by Dave*

**Probability**

Thank you for the explanation MathMate! Would the answer to this question be A? Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her ...
*Sunday, March 4, 2012 at 6:56pm by Student*

**Math**

I need help with the second question: A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly? Answer is 1/5 What is the probability that the student will answer...
*Saturday, November 19, 2011 at 6:00pm by Tanya*

**Math**

A multiple choice quiz contains five question. Each question has four answer choices. Michael is not prepared for the quiz and decides to guess for each question. What is the probability that Michael will get at least one question correct? What is the probability that Micheal ...
*Monday, April 29, 2013 at 1:09pm by Ashley *

**Statistics**

Over time, a student analyzes her ability to guess correctly after narrowing down multiple choice answers in a 5-selection question (a thru e). She discovers that if she narrows her answers to 2 or 3 choices, her probability of getting the right answer is 0.8, but if she still...
*Monday, November 19, 2012 at 8:17pm by PetarI*

**Probability**

Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78
*Sunday, March 4, 2012 at 2:02pm by Student*

**statistics**

A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly? What is the probability that the student will answer the first question incorrectly?
*Saturday, November 19, 2011 at 1:30am by Tanya*

**Math**

A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly? What is the probability that the student will answer the first question incorrectly?
*Saturday, November 19, 2011 at 3:39pm by Tanya*

**Probability**

Mary took a 20 question multiple-choice exam where there are 4 choices for each question and only 1 of those choices is correct. Rather than reading the question, Mary simply puts a random choice of answer down for each question. Determine the probability that Mary gets ...
*Saturday, January 5, 2013 at 10:27pm by John*

**Probability**

Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78 Explanation please??
*Sunday, March 4, 2012 at 2:28pm by Student*

**math**

can you help me find the probability to the question? A spinner like the one shown is ued in a game. Determine the probability of each outcome if the spinner is equally likely to land on each section. Express each probability as a fraction and as a percent. Spinner has #s 1-16...
*Tuesday, December 2, 2008 at 4:37pm by gaby*

**stats**

You took a 5-question multiple choice quiz with 4 choices for each question. If you guess at random on each question, what is the probability that you get at least one question correct?
*Tuesday, November 15, 2011 at 9:01pm by sia*

**math,probability **

Hi, I don't understand a homework question, can anyone please help me? I'm bad at probability. what is the probability that when you pick two cards, you will select at least one king out of two in a deck of six standard cards? (assuming there are no jokers)
*Saturday, February 2, 2013 at 1:32pm by Samantha*

**Math/Prob**

We will have to assume the ESP estimation is correct. The resulting distribution is binomial, with 5 questions, and probability of success p=1-0.6=0.4, q=1-p=0.6 (failure). The probability of getting exactly n question correct (out of 5) is given by the binomial coefficient C(...
*Wednesday, May 23, 2012 at 3:08pm by MathMate*

**Math**

Thanks! T___T another question (Last one I promise, lol) The probability of a household subscribing to The Economist is 0.4 while the probability of subscribing to National Geographic is 0.6, and the probability of subscribing to NEITHER magazine is 0.2. What is the ...
*Sunday, March 6, 2011 at 6:08pm by Jacob*

**Probability**

I will let a = 1/175,711,536= 5.591145*10^-9 , to save typing. The expected number, among 200,000,000, is L = 2*10^8 a = 1.13823 The probability of P(k) of k winners is given by Poisson statistics: P(k) = L^k*e^-L/k! Probability of 0 winners = 0.32039 Probability of 1 winner...
*Tuesday, March 18, 2008 at 4:38am by drwls*

**Statistics/Probability**

And please disregard the probability of W question, It's .33 I'm pretty sure
*Sunday, July 7, 2013 at 12:00pm by y912f*

**probability**

well you can understand it like, for one qusetion getting right, the probability is=.5 as there are only two options true and false. for two qusetion getting right, the probability is=.5*.5 for three qusetion getting right, the probability is=.5*.5*.5...
*Wednesday, March 6, 2013 at 6:42am by saiko*

**Contitative Methodes**

CASE STUDY: 1 The bulbs manufactured by a company gave a mean life of 3000 hours with standard deviation of 400 hours. If a bulb is selected at random, what is the probability it will have a mean life less than 2000 hours? Question: 1) Calculate the probability. 2) In what ...
*Thursday, March 28, 2013 at 1:09pm by Sardar Hakim *

**probability**

Even if you are just starting to learn about probability you should be able to do this question. What did you get for each one ?
*Thursday, March 17, 2011 at 6:18pm by Reiny*

**statistics/probability**

1. The probability that a student passes mathematics is 2/3 and the probability that he passes biology is 4/9. If the probability of passing one course is 4/5, what is the probability that he will pass both courses?
*Saturday, October 23, 2010 at 5:30pm by Anonymous*

**probability in math**

Usually someone can help. Advanced college level probability questions often go unanswered. What is the question?
*Monday, October 6, 2008 at 11:27pm by drwls*

**statistics**

50 question multiple choices with A, B, C, D Probability of an unsual score? Probability of between 20 and 30 correct inclusive?
*Saturday, November 10, 2007 at 9:45am by Anonymous*

**Probability**

1/3 He asks three person a question, and only one of them tells the truth. The probability of getting the truthful man to answer is 1/3
*Friday, November 16, 2012 at 9:28pm by Jennifer*

**probability**

What is the probability of getting 80% or more of the questions correct on a 10-question true-false exam merely by guessing?
*Wednesday, March 6, 2013 at 2:34am by noman*

**Math**

The probability of all events occurring is found by multiplying the probability of the individual events. 2/3 * 1/6 = 2/18 = 1/9 So, with the information above, I don't know how P(A and B) could equal 0. The either-or probability is found by adding the individual probabilities...
*Wednesday, November 18, 2009 at 6:12pm by PsyDAG*

**probability in math**

can anyone help me with a probability question?
*Monday, October 6, 2008 at 11:27pm by puzzled*

**Math**

p=probability of scoring (success) = 0.8 q=probability of not scoring (failure = 0.2 Assuming the probability does not change over time and is independent of previous results, then we can apply the binomial distribution: P(7+ out of 8) =8C7*0.8^70.2+8C80.8^8 =0.34+.17 =0.50 (...
*Friday, May 24, 2013 at 10:03pm by MathMate*

**Statistics**

Use binomial probability because: probability is known and does not change over the experiment, outcome is binomial (success or failure), each step of the experiment is similar, p=0.25 n=10 P(r)=number of question correct =nCr(p^r)(1-p)^(n-r) nCr = binomial coefficient = n!/((...
*Tuesday, May 7, 2013 at 5:34pm by MathMate*

**Statistics**

It's a simple question I am just so confused with this discrete probability distribution. The question is: In the New Jersey Pick 3 game, you pay $.50 to select a sequence of three digits, such as 911. If you play this game once every day, find the probability of winning ...
*Thursday, March 24, 2011 at 1:10pm by Norilyn*

**math (probability)**

The probability that it will be rainy on Monday is 7/10. The probability that it will be windy on Monday is 6/10. These events are independent. What is the probability that it will be rainy or windy on Monday?: * a.21/50 b.29/50 c.22/25 d.3/25 Please respond to the question ...
*Saturday, September 22, 2007 at 1:19am by --*

**statistics**

The below table shows the probabilities generated by rolling one die 50 times and noting the up face. What is the probability of getting an odd up face? roll 1 Probability 0.22 roll2 probability 0.10 roll 3 probability 0.18 roll 4 probability 0.12 roll 5 probability 0.18 roll ...
*Thursday, May 3, 2012 at 8:05pm by sc*

**probability question - help!**

Gee you guys always seem to provide wrong answers to easy problems. By using geometric probability, we find the answer to be 11/36.
*Tuesday, November 20, 2012 at 10:26am by mathcounts*

**Probability**

I need help with this math question. Probability. In a poll, respondents were asked whether they were planning to vote in the local election. 475 respondents indicated that they were planning to vote and 496 said that they were not. What is the probability that the next ...
*Friday, July 23, 2010 at 12:10pm by AJC*

**math**

Out of a random sample of 35 year old mothers: Probability of false positive = (249/250)*0.05 = 0.0498 Probability of correct positive = (1/250)*0.65 = 0.0026 Probability of false negative (undetected Down's) = (1/250)*0.35 = 0.0014 Probability of correct negative = (249/250)*...
*Sunday, May 16, 2010 at 10:05am by drwls*

**Management**

The bulbs manufactured by a company gave a mean life of 3000 hours with standard deviation of 400 hours. If a bulb is selected at random, what is the probability it will have a mean life less than 2000 hours? Question: 1) Calculate the probability. 2) In what situation does ...
*Thursday, March 28, 2013 at 1:09pm by Rajan*

**PROBABILITY MATH**

Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 5 possible answers. Explain to me the answer?
*Wednesday, November 9, 2011 at 4:22am by HM*

**Math Probability *Repost***

Okay, but I was wondering would you use the same method (combination) for this question If a person buys 1000 LOTTO tickets, what is his probability of winning the grand prize?
*Sunday, December 1, 2013 at 10:58pm by Tina *

**Math probability question**

The probability is the area of choice divided by total area. 2) Pr(y)=areay/totalarea=120/360=1/3
*Wednesday, October 8, 2008 at 11:27pm by bobpursley*

**Algebra**

For question one use: P( A or B) = P(A) + P(B) - P(A and B) The rule for OR takes into account those values that may get counted more than once when the probability is determined. Let P = probability Let A = biographies Let B = reference book Can you finish?
*Friday, February 22, 2008 at 6:43pm by blueridge*

**Math check and question**

x is a binomial random variable. (Give your answers correct to three decimal places.) (a) Calculate the probability of x for: n = 1, x = 0, p = 0.15 P(x) = Correct: Your answer is correct. . (0.85) (b) Calculate the probability of x for: n = 3, x = 3, p = 0.15 P(x) = Incorrect...
*Thursday, June 6, 2013 at 6:03pm by Nora 57*

**probability question**

if the odds agaisnt you winning are 1 to 7,what would the probability that you would win?
*Sunday, April 8, 2012 at 5:16pm by jazz hands*

**MATH Prob.**

The probability of getting the correct answer is 1/2 The probability of getting 4 correct in a row, to make a perfect on a 4 question test, can be found by (1/2)^4, or 1/16. What do you think the probability of getting a perfect on a 10-item test?
*Thursday, August 6, 2009 at 5:05pm by Marth*

**Math**

Each question has a 1/5 chance of getting it correct solely by guessing. The probability of both/all events is found by multiplying the probability of the individual events.
*Thursday, March 24, 2011 at 7:47pm by PsyDAG*

**Math**

In an experiment, the probability of the event E is known to be .4. Also the probability of the event F is .8,and the probability of E∪F is 1. i) Compute the probability of these events: P(E∩F)= P(E-F)= ii) Suppose the experiment is run twice in succession. What ...
*Thursday, April 21, 2011 at 6:55pm by Tracy*

**statistics**

if n units are independent and the probability of each being up is 2/3 then the probability of all n being up is (2/3)^n HOWEVER I can not see your flow chart and therefore can not evaluate parallel paths if there are two ways to get from A to B and the probability of failure ...
*Monday, February 17, 2014 at 8:34pm by Damon*

**Finite Math**

An urn contains sixteen red balls and seventeen white balls. A sample of three balls is selected at random and the number of red balls observed. Determine the probability distribution for this experiment: Number of Red Balls/Probability 0...Probability=? 1...Probability=? 2......
*Thursday, April 5, 2012 at 12:28am by Amanda*

**Statistics**

Sarah took a Statistics midterm which consisted of 13 multiple choice questions. Each question had 6 possible response options. Sarah answered 8 of the 13 questions correctly. Assume that Sarah had the same probability of getting each question correct. What is the most likely ...
*Saturday, February 19, 2011 at 3:19pm by Eric*

**Math/Prob**

Claire takes a five-question true-false test. She hasn't studied, so she guesses at random. With her ESP she figures she has a 60% probability of getting any one answer wrong. A. What is the probability of getting an answer wrong? (Do you think they want me to ignore the ESP ...
*Wednesday, May 23, 2012 at 3:08pm by Ben*

**statistics**

A student is taking a multiple choice test where each question have 5 possible answers of which only one is right. If the student knows the answer the student answers correctly, otherwise there is a 20% probability of correct answer. Assume the student knows 70% of the ...
*Wednesday, September 12, 2012 at 3:30pm by erick*

**statistics**

The probability of answering a true-false question correctly by just guessing is 1/2 or .5. The probability of getting all the questions correct (in this case, 6) is found by multiplying the probabilities of the individual events. I'll let you do the calculations. I hope this ...
*Saturday, December 5, 2009 at 11:52pm by PsyDAG*

**Math Probability**

I decided to add my name. This is my first time on here and I wanted to see what its all about... another question I'm struggling with If a person buys 1000 LOTTO tickets, what is his probability of winning the grand prize?
*Sunday, December 1, 2013 at 8:35pm by Tina *

**statistics**

10. A student is taking a multiple choice test where each question have 5 possible answers of which only one is right. If the student knows the answer the student answers correctly, otherwise there is a 20% probability of correct answer. Assume the student knows 70% of the ...
*Wednesday, September 12, 2012 at 3:27pm by mutinda*

**NSU, Finite Math**

Problem Solving:Using the Binomial Formula: P(x)=(nCx)pxqn-x A Dozen Eggs An egg distributor determines that the probability that any individual egg has a crack is .014. a)Write the binomial probability formula to determine the probability that exactly x of n eggs are cracked...
*Friday, April 6, 2007 at 6:42pm by Trudy*

**math-probability**

The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?
*Monday, November 30, 2009 at 6:55pm by GG*

**Math Probability **

If the probability that event A will happen is 1/4 and the probability of A not happening is 3/4, find the probability that event A happens 3 times out of 7 experiments
*Monday, April 16, 2012 at 2:03pm by Antonio*

**Math**

Can somebody help me with the following probability question? There is none like it to refer to in my textbook and I am confused. Explain how you would determine the probability that a given household in your community is watching the 10:00m tv news on a Wednesday night?
*Saturday, June 18, 2011 at 4:39pm by Michelle*

**Pre-Algebra**

Hi, Well, I have a test tomorrow and I was hoping thats someone could maybe help me? I don't understand probability... Here's a question I don't understand: Find the probability of tossing three coins and getting only two tails. Can anyone help?
*Friday, May 23, 2008 at 12:28am by Lily*

**Needs probability and statistics help**

By the way, it is not clear to me from the wording of the question if h, t, t is the same as t, h , t or not the first way there are 6 possible outcomes. The second way there are 8 If order does not matter 1 h h h 2 h h t 3 h t t 4 t t t probability of each event here is 1/4 ...
*Saturday, September 29, 2012 at 6:18pm by Damon*

**Math**

How do you do this question? It has to do with dependent events. There are 2 green marbles, 3 blue marbles and 4 red marbles. Find the probability for the question below if you pick a marble, do not replace it, then pick a second marble. Probability of green, then red Please ...
*Wednesday, March 11, 2009 at 11:39pm by Zanie*

**algebra 2**

What you are being asked is what is the probability of getting 3 and 5 or two 4s on the next roll. On the second problem, the probability of getting a 3 is 1/6 and "anything else" is 1. With the information below, you should be able to calculate the probability of a pair of 3s...
*Tuesday, March 10, 2009 at 9:40am by PsyDAG*

**Math**

The probability of a head on each toss = .5 or 1/2. The probability of getting a 4 is 1/6. The probability of all the events occurring is found by multiplying the probability of the individual events — 2 coin tosses and one roll of the die. I hope this helps. Thanks for asking.
*Wednesday, June 17, 2009 at 8:33pm by PsyDAG*

**Probability**

You roll two dice. What is the probability that the sum of the dice is even and one die shows a 4? A 6x6 table of dice outcomes will help you to answer this question. A. 1/6. B. 5/18. C. 2/3. D. 5/36.
*Wednesday, May 8, 2013 at 8:41am by so confused!*

**Biostatistics**

I'm not sure what you mean by "P(X=x). If it is probability, add the probabilities for the two lower categories to indicate the probability that it is either (10-14) or (15-19). Does "Mid" refer to median? I hope this helps. If not, repost your question in clearer terms.
*Sunday, March 28, 2010 at 9:25pm by PsyDAG*

**probability**

ok but how do i find the final probability? i see how i can get the probability of a certain combination, but i don't understand how i can find that end probability.
*Sunday, February 28, 2010 at 1:55pm by Ryan!*

**Probability Math **

Event A has probability of 0.2 and event B has probability of 0.3. If they are independent, what is the probability that both of them happen? I can't remember how to do this one.
*Sunday, September 29, 2013 at 4:48am by Alex*

**math**

However, the probability of getting 5 (or any other number 1-6) on a die is 1/6. The either-or probability is found by adding the probability of individual events. The sum of both dice = 5 can be obtained by 1, 4 4, 1 2, 3 or 3, 2 The probability of getting any one of these ...
*Saturday, April 25, 2009 at 9:28pm by PsyDAG*

**Probability Questions**

Harrumph. You are asking us to take a 17 question test for you. You have shown no effort at all. That is not what we do here. In (o) NOT KNOWING what the first card drawn is, the probability of the second card being a face card is 12/52 = 3/13. I could be any card in the ...
*Tuesday, May 24, 2011 at 11:09pm by drwls*

**stats**

a student randomly guesses at five multiple-choice questions, each question has five possible choices (suppose the choice for each question is independent): a) Find the probability that the student gets exactly three correct. b) What is the probability that the student gets ...
*Saturday, March 31, 2012 at 7:13pm by jeanette*

**Statistics**

Here's another tricky probability question. A soccer player scores an average of 3 goals per game: a) What is the probability that he or she will score 4 goals in a given game?
*Monday, March 7, 2011 at 10:38pm by James*

**math-Probability**

In a certain manufacturing process the probability of a type I defect is 0.21, the probability of a type II defect is 0.31, and the probability of having both types of defects is 0.01. Find the probability of having neither type of defect.
*Friday, March 16, 2012 at 11:59pm by Emma*

**Math**

10. A coin is loaded so that the probability of heads is 0.55 and the probability of tails is 0.45, Suppose the coin is tossed twice and the results of tosses are independent. a.What is the probability of obtaining exactly two heads? b.What is the probability of obtaining no ...
*Sunday, March 2, 2014 at 3:45pm by Renee*

**algebra I**

If you toss a coin, the probability of gettig heads is 1/2. If you toss a coin 2 times. the probability of getting heds each time is 1/2*1/2 or (1/2)^2. -Write an expression to represent the probability of tossing a coin 'n' times and getting 'n' heads. -Express your answer to...
*Thursday, February 7, 2008 at 5:43pm by Joanne*

**Math - PLEASE**

I roll twelve 4-sided dice. What is the probability that I roll at least one 2? What is the probability that I roll exactly three 2s? i dont knowm sorry the same question was answered by Economist at 4:59
*Thursday, March 29, 2007 at 4:19pm by Lauren*

**probability**

What is the probability of getting 80% or more of the questions correct on a 10-question true-false exam merely by guessing? probability - Damon, Wednesday, March 6, 2013 at 2:53am Binomial distribution with p = .5 p(10 right) = c(10,10) .5^10 (.5)^0 =.5^10 = .000976 p( 9 ...
*Wednesday, March 6, 2013 at 6:42am by noman*

**Math**

If the campers are as likely to be from here or from some other state then the probability that a particular camper is from this state is 1/50 The probabilities are independent so the probability that all 8 campers are from this state is (1/50)^8 However it seems unlikely that...
*Sunday, May 26, 2013 at 1:07pm by Damon*

**Math**

Find the probability of: a) Rolling a three OR a six with a single die Answer: P(3 U 6)= n(3U6)/n(S) = 3+6/6 = 9/6 reduced: 3/ b) Dealing an ACE OR a FACE CARD from a standard deck Answer: P(A U F)= 4/52 + 12/52 = 4/13 2. A 5-committee is to be chosen from 4 teachers and 4 ...
*Sunday, March 6, 2011 at 6:08pm by Jacob*

**probability question - help!**

you ask two many question but the answer is 1/6
*Tuesday, November 20, 2012 at 10:26am by Anonymous*

**probability**

One chip drawn would have to be 5 and that probability is 1/8. The probability that a second drawn chip is not larger than 5 is 4/7. The probability of the third chip not being larger than 5 is 3/6, or 1/2. This is true regardless of the order they are drawn. Total probability...
*Friday, June 24, 2011 at 6:15pm by drwls*

**stats again**

ok I get it, so once I get the prob figred for one person, how do I figure it if additional attempts are made and the question is about the prob of at least one of the additional attempts say n = 6 getting the same results as the first Once you have the probability of passing ...
*Thursday, July 5, 2007 at 7:38pm by holly*

**math help please**

first card was red so now I have 51 cards 25 are red and 26 are black so 25/51 ( are you sure you typed this question the exact way it was in the book?) ------------------------------------- probability of the first 3 = 1/6 and the second not 3 = 1/6*5/6 = 5/36 since ...
*Monday, January 19, 2009 at 10:35am by Damon*

**math**

The probability that it will be rainy on Monday is 7/10. The probability that it will be windy on Monday is 6/10. These events are independent. What is the probability that it will be rainy or windy on Monday?: * a.21/50 b.29/50 c.22/25 d.3/25 Please respond to the question ...
*Saturday, September 22, 2007 at 1:15am by --*

**MATH Prob.**

You can convert between fractions and decimals - the important part of this question is finding the probability. Try finding the probability, in either format, and we will be happy to critique your work or help you convert answer formats.
*Saturday, August 8, 2009 at 1:55pm by Marth*

**EASY MATH QUESTION**

What is the probability of rolling a 1, 2, 4, 5, or 6 on a six sided dice? MAKE SURE TO READ THE QUESTION CAREFULLY!
*Tuesday, June 7, 2011 at 2:38pm by Vince*

**math**

a. probability=numberwaysright/total number ways=1/6 b. there are the following odd numbers: 1,3,5. There are six possible numbers probability=3/6=1/2 c. Less than five means not 5, or 6 probability=1-2/6 d. no greater than three means 1,2, or 3 probability=3ways/6possible=1/2
*Thursday, May 30, 2013 at 11:13pm by bobpursley*

**Intro to Probability**

For firm 1 Probability of getting contract a only = probability of getting a - probability of getting both = 1/3 - 1/9 = 2/9 Probability of getting contract b only = 2/9 Probability of getting a and b both = 1/9 so E($) = (4/9)90 k + (1/9) 180 k = 40 + 20 = $60 K
*Saturday, February 23, 2008 at 7:14pm by Damon*

**math-i have another question**

Player A and B invented a new game. The probability for Player A to win a round is 1/3 and the probability that Player B will win a round is 2/3. To make the game fair, Player A will score 3 points when he/she winds a round and Player B will score 2 points when he/she wins. ...
*Monday, May 21, 2007 at 10:13pm by Amaris*

**Probability**

Suppose that you visit Shire, and find that 28% of Hobbits believe in the existence of Elves, 16% believe in the existence of Ents, and 9% believe in the existence of both Elves and Ents. You come across a Hobbit: i) What is the probability that he will believe in Ents given ...
*Saturday, December 7, 2013 at 8:15pm by Emma*

**discrete probability distribution (help please!)**

Add the probabilities that 0, 1, 2 or 3 components have failed. That sum will be the probability that the machine works. The probability that none have failed is P(0) = 0.8^7 = 0.210 The probability that one part has failed is P(1) = 0.8^6*0.2*7 = 0.367 The probability that ...
*Monday, April 12, 2010 at 9:52pm by drwls*

**Statistics**

You have a ten question multiple choice test in your next class and you did not study at all. Each question has four choices and only one correct answer. You are going to guess on each question. What is the probability that you score at least a 20% on the test.
*Tuesday, May 7, 2013 at 5:34pm by Liz*

**Statistics**

Suppose you conduct a study and find that the probability of having a baby boy is 60%. Now suppose three of your relatives are going to have babies. a) Build a tree diagram showing all the conditional probabilities and joint probabilities associated with the sex of the three ...
*Saturday, May 10, 2008 at 11:24pm by Danny*

**Statistics**

Suppose you conduct a study and find that the probability of having a baby boy is 60%. Now suppose three of your relatives are going to have babies. a) Build a tree diagram showing all the conditional probabilities and joint probabilities associated with the sex of the three ...
*Sunday, May 11, 2008 at 10:14am by Danny*

**Statistical Methods**

To get the probability that all events would occur, you need to multiply the probability of each of the individual events. The probablitiy of no rainy days is .8^15. The probability of one rainy day is .2 * .8^14. The probability of two rainy days is .2^2 * .8^13. The ...
*Tuesday, March 11, 2008 at 11:31pm by PsyDAG*

**Math**

3 and 6 are multiples of 3. The probability the either one or the other events would occur is obtained by adding the probability of the individual events. Probability = 1/6 + 1/6 = 2/6 = 1/3 2, 4 and 6 are even numbers = 1/6 + 1/6 + 1/6 = 3/6 = 1/2 The probability that both/...
*Saturday, June 13, 2009 at 12:20pm by PsyDAG*

**Math**

i have my final tomorrow and this question was on my review? im having trouble with probability so... "your cat walks over the computer keyboard while you're away and hits three random letters. what is the probability that the word RAT appears" So on my calculator do i 26 nCr ...
*Monday, December 12, 2011 at 10:00pm by Mandee*

**statistics**

For any married couple who are members of a squash club, the probability that the husband has a degree is 2/4 and the probability that the wife has a degree is 1/4. The probability that the husband has a degree given that his wife has a degree is 3/9. A married couple is ...
*Saturday, December 3, 2011 at 8:23pm by Nabiha*

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