Thursday

April 17, 2014

April 17, 2014

Number of results: 10,145

**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**

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*

**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*

**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*

**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*

**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*

**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**

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*

**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*

**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*

**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*

**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*

**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*

**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*

**Probability **

On a single toss of a pair of dice, the probability of getting a seven are 1/6. For three consecutive tosses of 7, the probability is (1/6)^3 = 1/216
*Sunday, February 20, 2011 at 11:11pm by drwls*

**Math**

A spinner has numbers 1-16 on it. Probability of 6? 1/16 Probability not 6 15/16 Probability even number 8/16 Probability multiple of 3 5/16? Probability not a multiple of 3 11/16?
*Wednesday, November 28, 2012 at 6:07pm by Jerald*

**math**

probability of one 5 = 4/52 probability of two 5s = 4/52*3/51 probability of three 5s =4/52*3/51*2/50 probability of four 5s=4/52*3/51*2/50*1/49 so probability of at least one 5 = sum of all those subtract that from 1 to get the probability of none.
*Thursday, July 29, 2010 at 12:24am by Damon*

**probability**

Another way to compute this is by counting the number of ways you can make the three numbers diffrent. If you choose X first, then you have 6 choices for X. If Y is next then there are 5 choices for Y lft and 4 for Z. So, there are 6*5*4 possibilities. The probablity of any ...
*Tuesday, November 20, 2007 at 2:36am by Count Iblis*

**COLLEGE MATH**

The probability of picking the first number correctly is 1/56, since zero is included. Since the numbers are not replaced, the probability of the second is 1/55, the third, 1/54 and so on. The probability of all events occurring is obtained by multiplying the individual ...
*Wednesday, April 22, 2009 at 8:18pm by PsyDAG*

**12th grade**

one type of probability used everyday is: a)experienced probability b)scientific probability c)frequency of occurence d)none of the above
*Wednesday, December 15, 2010 at 9:20pm by david *

**probability**

The probability that a bus will arrive late at the civic center is. 35, and the probability that it will be on time or early in. 60. Explain why the statement is incorrect.
*Sunday, December 12, 2010 at 11:04am by Sherice*

**probability-April**

The probability that a student passes Mathematics is 2/3 and the probability that he passes English is 4/9. If the probability that he will pass at least one subject is 4/5, then what is the probability that he will pass (i) Both the subjects? (ii) Exactly one of the subjects...
*Thursday, April 18, 2013 at 10:08am by Anonymous*

**Probability**

When I swing at a nail, I drive it all the way in with probability 1/2. With probability 1/4, I hit it half-way in, and with 1/4 probability I miss it entirely. I'm pretty sure that if I swing 4 times at a nail, I'll get it all the way in almost all the time. Let's see if I'm ...
*Sunday, November 10, 2013 at 1:43pm by Halp*

**PROBABILITY**

This is the probability of selecting one lucky and two unlucky tickets. The probability of all events occurring is found by multiplying the individual probabilities. 3/10 * 7/9 * 6/8 = ?
*Wednesday, October 20, 2010 at 2:57pm by PsyDAG*

**math**

Each letter has a probability of 1/26 and the numeral has a 1/10 probability. Multiply the eight probabilities and the denominator of the product will be you answer for a. The probability for "math4you" is the above product. The probability for "math" = (1/26)^4. I hope this ...
*Tuesday, February 26, 2008 at 4:03pm by PsyDAG*

**statistics**

The probability of drawing an Ace is 4/52, while the probability of drawing some other card is 48/52. The probability of all events occurring is found by multiplying the probability of the individual events. I hope this helps.
*Tuesday, January 26, 2010 at 7:02pm by PsyDAG*

**Dice Probability**

No. The probability of the first die rolling a 2 is 1/6. The probability of the second die rolling a 3 is 1/6. The combined probability is 1/36.
*Monday, September 30, 2013 at 9:35am by Graham*

**math-binomial prob**

Use the binomial theorem to get the possibility of 0,1,2,3,4 and 5 correct. For zero correct, the probability is just (3/4)^5 = 0.2373. 3/4 is the probability of getting each one wrong. For five correct, the probability is (1/4)^5 = 0.0001 For one correct, (one success and 4 ...
*Friday, December 14, 2007 at 12:44pm by drwls*

**algebra**

a basketball player shoots 70% of freethrows he has a 1 an 1 what is the probability of him shooting o,1,2 points * algebra - bobpursley, Sunday, January 2, 2011 at 12:41pm Pr(0)=.3 Pr(1)= .7*.3 pr(2)=.7*.7 ---------------------------------- * means times, multiply probability...
*Sunday, January 2, 2011 at 2:47pm by Damon*

**PROBABILITY**

The probability ofdrawing just one club in the 52 draws = 1/4 * (3/4)^51 The probability of drawing two clubs — which fits the "at least" description — in 52 draws = (1/4)^2 * (3/4)^50 The probability of drawing three clubs in 52 draws = (1/4)^3 * (3/4)^49 Or you could go from...
*Thursday, April 17, 2008 at 11:24pm by PsyDAG*

**Math-Probability**

Hello, I'm trying to figure out this probability problem. Can anyone help walk me through? Thank you so much!! A box contains 10 green, 2 red, 7 yellow, and 6 blue marbles. Four marbles are drawn from the box without replacement. a) What is the probability that all four ...
*Friday, August 7, 2009 at 2:42pm by Marie*

**business**

suppose that al knows that the probability of an investigation is 0.70 how low must the probability of water's completing its research on time be so that the probability of litres being awarded the contract is at least 0.65?
*Monday, December 24, 2012 at 7:40am by vinoth*

**MATH**

IF THE PROBABILITY OF A IS 3/5.AND PROBABILITY OF A INTERSECTION B IS 3/10.WHAT IS THE PROBABILITY OF B?
*Saturday, December 15, 2012 at 4:51pm by Anonymous*

**statistics**

odd numbers = 1, 3, 5, 7, 9 even numbers = 2, 4, 6, 8 you are looking for the probability of getting 1, 2, or 3 balls with odd numbers. 5/9*4/8*3/7 = probability of selecting one odd number 5/9*4/8*4/7 = probability of selecting two odd numbers 5/9*4/8*3/7 = probability of ...
*Monday, September 13, 2010 at 10:25pm by PsyDAG*

**statistics**

odd numbers = 1, 3, 5, 7, 9 even numbers = 2, 4, 6, 8 you are looking for the probability of getting 1, 2, or 3 balls with odd numbers. 5/9*4/8*3/7 = probability of selecting one odd number 5/9*4/8*4/7 = probability of selecting two odd numbers 5/9*4/8*3/7 = probability of ...
*Monday, September 13, 2010 at 10:25pm by PsyDAG*

**statistics - probability**

A total of 16 mice are sent down a maze, one by one. From previous experience, it is believed that the probability a mouse turns right is .38 a) What is the probability that 8 or fewer turn right? b) What is the probability that 8 or more turn right? c) What is the probability...
*Friday, October 12, 2012 at 2:01pm by andy*

**probability and statistics I NEED HELP**

The MSU basketball team is playing OU. If the probability that MSU wins the game is 0.68 and the probability that OU wins is 0.27. 1. Find the probability that MSU or OU wins. 2. Find the Probability that there is a tie.
*Wednesday, May 11, 2011 at 9:17pm by Emily*

**statistics**

Let a random variable be distributed as shown below X=x : 0,1,2,3,4,5,6 P(x): .1 .09 .2 .15 .16 .2 (a) Find the probability p(6) (b) Find the probability P(3< X < 5) (c) Find the probability P(X < 4) (d) Find the probability P(X > 2)
*Saturday, September 17, 2011 at 11:01am by kim wallace*

**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*

**Determining Probabilities**

When would you expect the experimental probability of an event to be closest to its theoretical probability? When the results of 10 trials were used in calculating the theoretical probability When the results of 10 trials were used in calculating the experimental probability ...
*Tuesday, February 18, 2014 at 1:42pm by Jamar*

**probability**

To get one red out of the seven, you have 4 chances, so the probability is 4/7. Since the chips will be replaced, the second and subsequent draws will be under the same conditions, i.e. they are independent. The probability of each subsequent draw is again 4/7. The probability...
*Tuesday, October 6, 2009 at 11:57am by MathMate*

**statistics**

The answer to part a) is 1/2 As for the others, I have never heard of "personal probability" There are two kinds of probability: 1. Empirical Probability which is based on the results of experiments to collect data about an event 2. Mathematical Probability base on the ...
*Sunday, March 9, 2008 at 8:54pm by Reiny*

**math**

Suppose the probability that a construction company will be awarded certain contract is .25, the probability that it will be awarded a second contract is .21, and the probability that it will get both contracts is .13. What is the probability that the company will win at least...
*Friday, October 19, 2007 at 9:07pm by crissy*

**probability and statistics**

The MSU basketball team is playing OU. If the probability that MSU wins the game is 0.68 and the probability that OU wins is 0.27. 1. Find the probability that MSU or OU wins. 2. Find the Probability that there is a tie.
*Wednesday, May 11, 2011 at 7:16pm by Emily*

**Probability & Statistics**

A basketball player shoots free throws and makes them with probability 1/3. What is the probability the player will miss three in a row?
*Thursday, July 29, 2010 at 5:50pm by anonymous*

**probability**

The probability that patient recovers from a delicate heart operation is 0.9. What is the probability that exactly 5 of the next 7 patients having this operation survive?
*Monday, August 30, 2010 at 7:57pm by jim*

**probability**

hi! how would you figure out a problem where you are given a probability of success for 12 people and you are trying to find the probability of success for 1 person?
*Tuesday, December 8, 2009 at 2:29pm by ali*

**probability**

Each person has a 1/3 probability of making the choice from 3. The probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
*Tuesday, November 20, 2012 at 11:23am by PsyDAG*

**Probability **

Suppose that an unfair coin comes up heads 54.1% of the time. The coin is flipped a total of 13 times. a) What is the probability that you get exactly 6 heads? b) What is the probability that you get exactly 6 tails? c) What is the probability that you get at most 9 tails?
*Friday, February 24, 2012 at 12:06am by Vikki*

**Math - Probability**

A developer can buy a piece of property that will produce a profit of $16,000 with probability .7, or a loss of $9000 with probability .3. What is the expected profit?
*Monday, December 7, 2009 at 3:07pm by Stephanie*

**probability**

The probability that a student passes Biology is 0.35 and the probability to pass Chemistry is 0.63. If the probability to pass both Biology and Chemistry is 0.4, what is the probability that he will pass either Biology or Chemistry?
*Wednesday, February 15, 2012 at 8:43am by Anonymous*

**maths-probability**

A family has four children. The probability of having a girl is 1/2. What is the probability of having 2 girls followed by 2 boys?
*Wednesday, April 16, 2008 at 9:26am by louis*

**Statistics**

A. Probability of 0 or 1 job offer. B. Probability of 2 or 3 job offers. To find either-or probability, add the individual probabilities.
*Wednesday, May 19, 2010 at 9:48pm by PsyDAG*

**statistics**

Suppose that each unit of a system is up with probability 2/3 and down with probability 1/3. Different units are independent. For each one of the systems shown below, calculate the probability that the whole system is up (that is, that there exists a path from the left end to ...
*Monday, February 17, 2014 at 8:34pm by sam*

**probability maths**

Jim rolls a dice twice. The dice is biased so the probability of getting a six is one quarter. WHat is the probability that he gets two sixes
*Saturday, January 30, 2010 at 4:51am by Latika*

**Economics/Math**

1. Assume that q and z are two random variables that are perfectly positively correlated. q takes the value of 20 with probability 0.5 and the value of zero with probability 0.5, while z takes the value of 10 with probability 0.5 and the value of zero with probability 0.5. ...
*Saturday, December 5, 2009 at 6:39am by Susan*

**Statistics**

Find P(0), then take 1 - P(0) for your probability (since the problem says "what is the probability that at least one" is defective). Using the binomial probability function (you can use a binomial probability table as well): P(x) = (nCx)(p^x)[q^(n-x)] n = 4 x = 0 p = 17/53...
*Sunday, September 9, 2007 at 9:58pm by MathGuru*

**Math**

0.98^7 is the probability that none of them are unlicenced. So, 1 minus this probability is the probability that one or more are unlicenced.
*Wednesday, March 25, 2009 at 9:29pm by Count Iblis*

**math**

If you take 7 minus the result of a dice throw, then that's another valid dice throw. So, for two dice throws, the probability that the sum is greater than 8, is the same as the probability of 14 minus the sum being larger than 8, which is the same as the probability of the ...
*Saturday, April 25, 2009 at 2:42pm by Count Iblis*

**math**

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?
*Wednesday, November 18, 2009 at 4:10pm by CLA*

**math**

200/400 = probability of finding rusted object. 100/400 = probability of choosing a bolt Either-or probability found by adding individual probabilities.
*Tuesday, October 5, 2010 at 12:26am by PsyDAG*

**stat**

Three coins are tossed, and the number of heads observed is recorded. (Give your answers as fractions.) (a) Find the probability for 0 heads. (b) Find the probability for 1 head. (c) Find the probability for 2 heads. (d) Find the probability for 3 heads.
*Friday, July 6, 2012 at 2:19am by jilla*

**Algebra 2**

Can someone please explain how to do this problem? The probability that it will rain today is 65%, and the probability that it will rain tomorrow is 25%. The probability that it will rain both days is 35%. What is the probability that it will rain today or tomorrow?
*Tuesday, February 4, 2014 at 6:48pm by Jane*

**MATH Prob.**

Assuming no replacement, the probability of a diamond is 1/13. Once that is drawn, the probability of a black 10 (spade or club) or a black 7 each is 2/51 (since one card is already drawn). The "either-or" probability is obtained by adding the individual probabilities, while ...
*Saturday, August 8, 2009 at 1:40pm by PsyDAG*

**math**

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?
*Wednesday, November 18, 2009 at 3:23pm by Kylie Castaneda*

**Statistics**

Probability of winning = 12/52 = 3/13 Probability of losing = 40/52 = 10/13 Probability of losing = 3 1/3 times the probability of winning. What would you consider fair? X * 3 1/3 = 5
*Sunday, September 26, 2010 at 11:00pm by PsyDAG*

**charle drew high**

The probability of an odd number (1,3 or 5) on the first roll is 3/6=1/2 For the second roll, to get a multiple of three (3 or 6) the probability is 2/6=1/3 The two rolls are independent. So the probability of succeeding both events is (1/2)*(1/3)=1/6
*Wednesday, February 8, 2012 at 5:16pm by MathMate*

**Math Probability**

"at random" means all choices have equal probability. Sample space = 20+13+6=39 There are 13 democrates and 6 independents for a total of 19. What is the probability?
*Monday, April 16, 2012 at 3:54pm by MathMate*

**Math: Probability**

I need help. Here's the queston. Julia has 3 red marbles, 4 blues,3 yellow and 6 black in a bag. She takes one out at random. The probability its black ___ The probability its yellow ___ The probability it isnt red ___
*Saturday, February 28, 2009 at 7:19pm by Mark*

**Probability **

A nickel is flipped and a dime is flipped. 1. What is the probability of obtaining exactly one head? A bag contains five balls numbered 0 through 4. Two balls are chosen at random in succession. The first ball is replaced before the second is chosen. 1. What is the probability...
*Thursday, February 7, 2013 at 8:26pm by Kyle*

**math**

Emily surmises that the probability tht she will pass math or chemistry is .95, the probability of her passing math is .7, and the probability of passing both is .55. Find her estimate of the probability of passing chemistry?
*Tuesday, November 22, 2011 at 11:34pm by Sam*

**Math**

Are these two different questions? anyway there are 12 socks probability of black = 6/12 probability of green = 2/12 probability black or green = 8/12 =2/3 probability that the sock is not black = 1 - probability of black = 1 -6/12 = 6/12 = 0.5
*Sunday, January 31, 2010 at 6:02pm by Damon*

**probability. review questions**

1)what is the probability that a seven-digit phone number has one or more repeated digits? 2) five letters, with repetition allowed, are selected from the alphabet. what is the probability that none is repeated?
*Wednesday, July 28, 2010 at 12:46am by sha*

**MATH**

p=probability of voting q=(1-p)=probability of not voting. Out of 5 adults randomly selected, the probability that exactly 2 voted is calculated according to the binomial expansion, C(5,2)p^2q^3 =(5!/(2!3!))*0.57^2*0.43^3 =0.258 (approx.)
*Sunday, May 13, 2012 at 6:58pm by MathMate*

**statistics**

A mini-computer system contains two components, A and B. The system will function so long as either A or B functions. The probability that A functions is 0.95, the probability that B functions is 0.90, and the probability that both function is 0.88. What is the probability ...
*Saturday, March 5, 2011 at 3:54am by Paula*

**elementry math **

I'm not sure what you mean by sample space. However, the probability of a gold ball is 2/5 and the probability of a black ball is 3/5. The probability of two or more events both occurring is found by multiplying the individual probabilities. They don't total 1, because they ...
*Sunday, January 10, 2010 at 12:32am by PsyDAG*

**statistics**

Assume a binomial probability distribution has p = .60 and n = 200. a)What are the mean and standard deviation (to 2 decimals)? b)Why can the normal probability distribution be used to approximate this binomial distribution? c)What is the probability of 100 to 110 successes (...
*Saturday, April 5, 2014 at 11:42pm by Vanessa*

**Math**

Without replacement, the probability of drawing the nickel is 3/10, the dime is 2/9 and the quarter is 5/8. Mulitply the probability of the three events to get the probability that all would occur. Each probability is dependent on the previous event. With replacement, the same...
*Thursday, December 13, 2007 at 8:45am by PsyDAG*

**Math - Statistics**

I roll 12 4-sided dice. What is the probability that I roll at least one 2? What is the probability that I roll exactly three 2s? So i take it, on any give roll, the probability of rolling a 2 is .25 (25%); the probability of rolling something else must be .75 The probability ...
*Thursday, March 29, 2007 at 2:39pm by Lauren*

**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 *

**math**

Carolyn tested a coin to see if it was evenly weighted. She flipped the coin 100 times and came up with 42 heads and 58 tails. How does the relative frequency of tails to heads compare to the probability of tails in this experiment? A. The relative frequency is the same as the...
*Saturday, June 8, 2013 at 7:59pm by bubbie*

**Math**

Probability of a 4 is 1/6, while a probability of a non-4 = 5/6. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/6 * 5/6 * 5/6 = ?
*Friday, November 1, 2013 at 8:50pm by PsyDAG*

**probability**

Two six-sided dice each have the numbers 1 through 6 on their faces. Neither die is fair, but they are both weighted the same. The probability of rolling a certain number on one die is given in the table below: # 1 2 3 4 5 6 probability 1/6 1/6 1/9 ? 2/9 ? If the probability ...
*Friday, March 8, 2013 at 12:37am by Anonymous*

**Intro to Probability**

Yes, this looks like an expected value problem. The probability of one or the other getting a contract both times (2/3)^2 = 4/9. The probability of I or II getting one only is 2*1/3*2/3= 4/9. The probability of missing out both times is 1/9. E.V. = (4/9)*180,000 + (4/9)*90,000...
*Saturday, February 23, 2008 at 7:14pm by drwls*

**Statistics**

Use the binomial probability function: P(x) = (nCx)(p^x)[q^(n-x)] n = 10 x = 0,1 p = 0.10 q = 1 - p = 0.90 Find P(0), P(1). Add together for your probability. Note: You can also use a binomial probability function table with the values listed to find the probability as well. ...
*Wednesday, April 10, 2013 at 3:00pm by MathGuru*

**probability problem**

A box contains 6 green, 8 red, 5 yellow, and 10 blue marbles. Four marbles are drawn from the box at the same time. a) What is the probability that all four marbles are the same color? b) What is the probability that none of the marbles is blue? c) What is the probability that...
*Friday, February 24, 2012 at 2:52pm by Sam*

**Algebra**

Probability all 5 are reduced is P(5) = (1/4)^5 = 0.000996 Probability that none are reduced is P(0) = (3/4)^5 = 0.3773 Probability that 3 out of 5 are reduced is P(3) = (1/4)^3*(3/4)^2* [5!/(2!*3!]= 0.0879 P(1) = (1/4)(3/4)^4*5 = 0.3955 P(2) = (1/4)^2*(3/4)^3*[5!/(2!*3!)] = 0...
*Thursday, March 6, 2008 at 1:13pm by drwls*

**Genetics**

Phenylketonuria, a Metabolic disease in humans, is caused by a recessive allele, k. If two heterozygotes marry and plan a family of six children: a)what is the probability that all will be unaffected? b)what is the probability that three will be unaffected and three will be ...
*Friday, September 2, 2011 at 2:10pm by Tommy*

**math-probability**

A student claims that if a fair coin is tossed and comes up heads 5 times in a row, then, according to the law of averages, the probability of tails on the next toss is greater than the probability of heads. What is your reply?
*Monday, April 19, 2010 at 1:35pm by jennifer*

**Economics/Statistics**

1. Assume that q and z are two random variables that are perfectly positively correlated. q takes the value of 20 with probability 0.5 and the value of zero with probability 0.5, while z takes the value of 10 with probability 0.5 and the value of zero with probability 0.5. ...
*Sunday, December 6, 2009 at 3:53am by Susan*

**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*

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