Search: math-Probablity

Number of results: 187,994

math probablity
Assume a family is planning to have three children. A. What is is the probablity of a family having 2 girls. B. The probablity of a family having at least 1 boy. C. List the sample space using a B for Boy and G for girl (Hint there should be 8 possible outcomes). ??????
Friday, April 26, 2013 at 9:51pm by Angela

Math-probablity
Assume a family is planning to have three children. A. What is is the probablity of a family having 2 girls. B. The probablity of a family having at least 1 boy. C. List the sample space using a B for Boy and G for girl (Hint there should be 8 possible outcomes).
Friday, April 26, 2013 at 4:33pm by Angela

probablity
You are off to soccer and love being a goalkeeper, but that depends who is the coach today : - with coach Ahmed the probablity of being a goalkeeper is 0.5 -with coach Usman the probability of being a goalkeeper is 0.3 Ahmed is coach more often.About 6 out of every 10 games ( ...
Friday, May 3, 2013 at 5:51am by arzam

math
You are off to soccer and love being a goalkeeper, but that depends who is the coach today : - with coach Ahmed the probablity of being a goalkeeper is 0.5 -with coach Usman the probability of being a goalkeeper is 0.3 Ahmed is coach more often.About 6 out of every 10 games ( ...
Thursday, May 2, 2013 at 2:47pm by arzam

maths
You are off to soccer and love being a goalkeeper, but that depends who is the coach today : - with coach Ahmed the probablity of being a goalkeeper is 0.5 -with coach Usman the probability of being a goalkeeper is 0.3 Ahmed is coach more often.About 6 out of every 10 games ( ...
Friday, May 3, 2013 at 3:32am by arzam

math
the probability of havingtype O blood is 1/2 and the probablity if having type A blood is 1/4. what is the probablity of a person having either typr O blood or type A blood ?
Sunday, April 29, 2012 at 5:36pm by Anonymous

Help????????????????????/
Assume a family is planning to have three children. A. What is is the probablity of a family having 2 girls. B. The probablity of a family having at least 1 boy. C. List the sample space using a B for Boy and G for girl (Hint there should be 8 possible outcomes).
Friday, April 26, 2013 at 4:58pm by Angela

Math
How good are you with probablity
Saturday, October 13, 2007 at 3:54pm by Ronda

math-Probablity
What is the probability of that ? lol
Tuesday, June 5, 2012 at 3:16pm by Reiny

math-Probablity
50 * 0.92 = ?
Tuesday, June 5, 2012 at 4:17pm by Ms. Sue

math algegra
one type of probablity used practically daily is?
Saturday, February 27, 2010 at 11:28am by Ben

College Math
How are statistics and empirical probablity related? What is a specific scientific decision?
Friday, March 27, 2009 at 11:34am by Vonsell

math
What is the probablity of getting at least one head as a result of flipping 6 fair coins?
Monday, June 11, 2012 at 9:06am by Gloria

math
Probablity is the liklihood of a certain event happening. For example, There is a 1/6 probability of me rolling a 6 on a standard dice when i roll it once.
Monday, January 28, 2008 at 5:40pm by Cassidy

math
probablity to the nearest tenth of a percent 11/68 to a decimal and percent
Tuesday, May 29, 2012 at 5:08pm by Taylor

MATH
probablity= area triangle/area circle
Sunday, January 25, 2009 at 5:53pm by bobpursley

math
An unprepared student makes random guesses for the ten true or false questions on a quiz.find the probablity that there is at least one correct answer.
Tuesday, October 27, 2009 at 10:53pm by rency

PROBABLITY
The fraction is 9/68
Tuesday, May 29, 2012 at 5:16pm by Ms. Sue

PROBABLITY
may you please tell me the fraction
Tuesday, May 29, 2012 at 5:16pm by Michael

Geometry
I think it has more to do with probablity
Friday, January 14, 2011 at 4:55pm by crystal

PROBABLITY
9/68 = 0.13235 = 13.2%
Tuesday, May 29, 2012 at 5:16pm by Ms. Sue

math
The ages of a population of 300 is normally distributed, with a mean of 45 and a standard deviation of 4. If you randomly selected a member of the population, what is the probablity that his or her age would be greater than 49?
Monday, June 11, 2012 at 12:18pm by Gloria

MATH
you have 4 blue crayons, 2 red and 3 orange, what is the probablity of pulling a red crayon and then an orange without replacement?
Friday, December 10, 2010 at 1:42am by BB

math
The odds against pats winning the election are 6:7 with these odds, what is the probablity that pat will win the election.
Saturday, March 10, 2012 at 9:51pm by karen

AU
What is probablity of 62 and probability of 59 with Mean of 60 and SD of 7
Sunday, March 20, 2011 at 9:55pm by Sheri

Probablity
5 out of 100? That means odds not occuring is 95/5 or 19/1.
Sunday, October 18, 2009 at 6:30pm by bobpursley

statistics
TOSS 2 PENNIES 20 TIMES. WHAT IS THE PROBABLITY OF GETTING 2 HEADS
Tuesday, April 1, 2008 at 11:13pm by HANEEN

Math
The combinations on the lockers at the highschool consist of three numbers, each ranging from 0 to 39. If a combonation is chosen at random, what is the probablity that the first two numbers are multiples of 9, and the third number is a multiple of 4?
Monday, July 21, 2008 at 4:34pm by Jen

math
How can one calculate the odds of winning the jackpot in the lottery. The probablity is the number of ways to win (usually one) divided by the number of possible entries.
Tuesday, July 3, 2007 at 1:06am by student

Statistics
If you roll two dice what is the probablity of getting one 2? I think the answer is 1/6 but I'm not sure
Saturday, October 13, 2012 at 12:36pm by Mary

math-Probablity
A packet of carrot seeds has a germination rate of 92%. In other words, the probability of any seed sprouting is 0.92. How many seedlings would you expect in a row of 50 seeds?
Tuesday, June 5, 2012 at 4:17pm by Leo

math
a bag contains 7 red marbles, 8 blue marbles and 4 green marbles. what is the probablity of choosing a blue marble?
Friday, June 15, 2012 at 1:10am by Anonymous

Probability
if two fair dice are rolled, what is the probablity that the total showing is even or less than seven?
Monday, July 11, 2011 at 11:06pm by Marie

math probablity- Respond as soon as possible
Assume a family is planning to have three children. 1. Why do probabilities centered around this scenario represent the same probabilities as those for flipping three coins
Friday, April 26, 2013 at 10:28pm by Angela

Statistics
There is a random selection of 150 students. What is the probablity that the sample percentage of correct identification is greater than 75%?
Tuesday, June 18, 2013 at 11:38pm by Katie

math
if two-card hand is dealth from a well-shuffled deck of 52 cards, what is the probablity that the hand contains two kings?
Sunday, November 22, 2009 at 1:36pm by Kay Kay

math
there are 3 miniature chocolate bars and 5 peaunt butter cups in a candy dish. judie chooses 2 of them at random. What is the probablity that both she chooses 2 miniature choclate bars?
Thursday, February 25, 2010 at 5:43pm by amanda

probablity
3R,6B,3W for a total of 12 marbles. P(R)=3/12
Friday, June 15, 2012 at 10:39am by MathMate

PROBABLITY
the nearest tenth percent of 9/68 decimal and percent
Tuesday, May 29, 2012 at 5:16pm by Michael

math-Probablity
A student is writing a multiple choice test consisting of 40 questions, each of which provides four possible choices. He is certain that he has 16 questions correct. If he guesses for all of the remaining 24 questions, what is the probability that he will pass the test?
Tuesday, June 5, 2012 at 3:16pm by demi

Math
Ok please help me. Here is my stats question Suppose there is a 20% chance of striking oil at a certain location. An oil company drills at 5 different spots. What is the probablity of them striking oil on at least one of the spots? Any help is greatly appreciated
Wednesday, February 3, 2010 at 9:17pm by Ted

math-Probablity
A golfer makes 80% of her putts from a distance of 5 metres or less from the hole. In order to calculate the probability that she would make 23 out of 27 putts or better on a given day, what boundary value should be chosen for X in order to find the appropriate z-score?
Tuesday, June 5, 2012 at 4:10pm by Angle

Math
A bag contains 5 balls,8 white balls, 9 green balls,7 blue balls& 6 yellow balls.A ball is drawn at random .Find the probablity that the ball in neither green nor red ?
Thursday, March 8, 2012 at 8:56am by Rajit Rastogi

Math
I'm trying to calculate probablity of dependent and independent events. For example, from 3 nickels, 2 dimes, and 5 quarters, what is the probability of drawing 1 nickel, 1 dime, and 1 quarter in that order without replacement? Or drawing the same in any order with ...
Thursday, December 13, 2007 at 8:45am by Danielle

Math
A bag contains 5 balls,8 white balls, 9 green balls,7 blue balls& 6 yellow balls.A ball is drawn at random .Find the probablity that the ball in neither green nor red ? please let me know the formula also
Thursday, March 8, 2012 at 8:56am by Rajit Rastogi

Probability
Find the probablity of getting a sum of at least 8 by tossing a six-sided die twice. I keep getting 5/36 but my book says 5/12.
Tuesday, May 20, 2008 at 11:11pm by Jamie

Math
In Lloyd's pocket are 6 coins: 3 dimes, 2 nickels, and 1 penny. If Lloyd randomly takes two coins out of his pocket, what is the probablity that he will take out 11 cents? The book shows the answer 1/5, but my question is wouldn't the number of each coin come into play?
Tuesday, January 26, 2010 at 1:47pm by Teri

Math
I have a few questions on my homework assignment. I've been sick and I have no idea what I'm doing. Question 1: Assume the hights of high school bball players are normally distributed. For the boys the mean is 74" with a standard deviation of 4.5" while girl ...
Sunday, March 30, 2008 at 10:42pm by Amanda

math-Probablity
Since you want the prob of making 23 or better, you would want the prob that she makes 23 of 27 +24 of 27 + 25 of 27 + 26 of 27 + 27 of 27 you will have 5 prob's to calculate , add them up
Tuesday, June 5, 2012 at 4:10pm by Reiny

Math
A vendor has 14 hellium ballons for sale: 9 are yellow, 3 are red, and 2 are green. A ballon is selcted at random and sold. If the ballon sold is yellow, what is the probablity that the next ballon selected at random, is also yellow?
Monday, April 18, 2011 at 3:03pm by ashely

statistics
1- The ages of a population of 300 is normally distributed, with a mean of 45 and a standard deviation of 4. If you randomly selected a member of the population, what is the probablity that his or her age would be greater than 49?
Monday, June 11, 2012 at 9:05am by Gloria

Probablity
What are the odds against an earthquake occuring on a certain day in a certain area if the odds of it occurring is 0.05?
Sunday, October 18, 2009 at 6:30pm by Paulette

probablity
A bag of marbles has 3 red, 6 blue, and 3 white marbles in it. What is the probability of reaching in and selecting a red marble? (without looking
Friday, June 15, 2012 at 10:39am by whit

STATISTICS
ASSUME THE THE MEAN WEIGHT OF CHILDREN AGES 7 IS 50 POUNDS AND A STANDARD DEVIATION OF 10. wHAT IS THE PROBABLITY THAT A RANDOM SELECTED 7 YEAR OLD WILL HAVE A WEIGHT THAT IS LESS THAT 65
Monday, February 11, 2013 at 5:31pm by SONIA GOVAN

math..probabilities
pr(H,H)=.6*.6= .36 pr(T,H)= .4*.6=.24 Pr(H,T)=.24 Pr(T,T)=.16 so the likelyhood of one head and one tail is .48, the probablity of both the same is .36+.16=.52
Thursday, July 15, 2010 at 8:21pm by bobpursley

Math-probablity
a) prob (2 girls out of 3) = C(3,2) (1/2)^2 (1/2) = 3(1/8) = 3/8 b) at least 1 boy --- no "all girls" prob (all girls) = 1/8 prob (at least 1 boy) = 1 - 1/8 = 7/8 c) BBB BBG BGB GBB GGB GBG BGG GGG
Friday, April 26, 2013 at 4:33pm by Reiny

math probablity- Respond as soon as possible
This is because each pregnancy is independent of the others so the chances of receiving either a boy or girl is 50% for each separate pregnancy. the same as flipping three coins, the chances of having either heads or tails is 50% and each flip is independent of the others.
Friday, April 26, 2013 at 10:28pm by jimbo

math
A drawer contains 4 red socks, 3 white socks, and 3 blue socks. without looking, you select a sock at random, replace it and seect a sond sock at random. what is the probablity that the first sock is blue and the second sock is red?
Monday, May 21, 2012 at 4:19pm by Melanie

math help please
two cards are dealt in succession from a standard deck of cards. what is the probability that the second card is red give that the first card was a heart. so i do p(R/H), then i know you go R*H/H. but how do i get the probability please explain! thanks. if 2 dice are rolled, ...
Monday, January 19, 2009 at 10:35am by Kennedy

math probablity- Respond as soon as possible
mmmh, in flipping one coin, and having one child: prob(heads) = 1/2, prob(tails) = 1/2 prob(boy) = 1/2 , prob (girl) = 1/2 for flipping 3 coins, or considering 3 kids: prob(1 head, 2 tails) = 3(1/2)^3 = 3/8 prob(1 boy, 2 girls) = 3(1/2)^3 = 3/8 etc.
Friday, April 26, 2013 at 10:28pm by Reiny

Math
Either-or probability is found by adding the individual probabilities. When you are concerned with the probability that all/both the events would occur, you multiply the individual probabilities. I will demonstrate with b. Probability of getting a female bullfrog is .3 * .4...
Monday, July 7, 2008 at 1:36am by PsyDAG

statistics
78% of us homes have a telephone. In a random sample 250 homes, what is the probablity that fewer than 50 do not have telephone
Saturday, July 23, 2011 at 2:06pm by debbie

elementary statistics
at a particular school with 200 male students, 58 play football 40 plays basketball and 8 plays both. what is the probablity that a randomly selected male student plays neither
Monday, October 10, 2011 at 11:10am by dorothy

Algebra1
A CELL PHONE ORDDERS 500 NEW PHONES FROM A MANFACTURE.IF THE PROBABLITY OF A PHONE BEING DEFECTIVE IS 2.6% PREDICT HOW MANY OF THE PHONES ARE LIKELY TO BE DEFECTIVE.ROUND TO THE NEAREST WHOLE NUMBER
Monday, December 5, 2011 at 9:14am by devin

math
I have a question in my math class in college. Here is the question, but I just need help on HOW to answer it. My text isn't clear at all. A box contains 2 black balls and 3 gold balls. 2 balls are randomly drawn in succession. a.if there is no replacement, what is the ...
Wednesday, November 18, 2009 at 9:34pm by Lauren

math probablity
anwered here http://www.jiskha.com/display.cgi?id=1367008412 Always check back before reposting a question.
Friday, April 26, 2013 at 9:51pm by Reiny

statistics
You draw two card from a standard deck of 52 cards and replace the first one before drawing the second. Find the probablity of drawing a 4 for the frist card and a 9 for the second card
Saturday, June 26, 2010 at 11:57am by Clay

math-Probablity
Assuming that a pass is getting at least 20 of the 40 correct .... What the student CANNOT have is zero of the remaining 24 correct : C(24,0) (1/4)^0 (3/4)^24 = .001003391 1 of the remaining 24 correct : C(24,1) (1/4) (3/4)^23 = .00802713 2 of the remaining 24 correct : C(24,2...
Tuesday, June 5, 2012 at 3:16pm by Reiny

math
Delta airline flights seats 340 people. An average of 5% of the people with reservations doesnt show up, so they overbook by 350. This system can be analyzed by using binomial distribution. n=350 and p=0.95 1) Find the probablity that 350 reservations there are more passangers...
Sunday, April 6, 2008 at 7:39pm by mel

Probability
Given the probability of rain on any given day in March is 1/5, find the probablity that: It rains on March 10 and 12, but not on March 11th. This is supposed to be used with multiplication Rule 1: P(A and B)= P(A)*P(B) cant figure it out, the answer is 4/125 and I have no ...
Thursday, January 24, 2013 at 9:03pm by anoneemose

Statistics
Ok please help me. Here is my stats question Suppose there is a 20% chance of striking oil at a certain location. An oil company drills at 5 different spots. What is the probablity of them striking oil on at least one of the spots? Any help is greatly appreciated
Wednesday, February 3, 2010 at 7:31pm by Aaron

statistics probablity
Each time that Ed Charges an expense to his credit card, he omits the cents and records only the dollar value. If this month he has charged his credit card 20 times what can be said about the probability that the record shows at least $15 less than the actual amount?
Thursday, December 16, 2010 at 11:28pm by Joe

Maths
What is the probablity that the next three kids will be boys? 1/2*1/2*1/2 What is the probability of having at least one girl in next three? 1-prob next three is boys.
Tuesday, November 6, 2007 at 5:05pm by bobpursley

Biology
If it happens that a neurotransmitter binds to a receptor site and produces a negative voltage, the probablity: A) that the neurons are densely connected increases B) of an excitatory response increase C)That the receiving neuron will fire decrease D)that the transmitting ...
Tuesday, August 31, 2010 at 12:37am by Rena

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

statistics
Three percent of the widgets produced by machine 1121 are defective. what is the probablity that a box of 30 widgets produced by that machine contains two or more defective widgets?
Saturday, December 10, 2011 at 10:30pm by John

math-Probablity
There are no stupid questions. All we expect you to do is to put in your honest effort to get the homework done. For a detailed example of a jellybean problem, see response to http://www.jiskha.com/display.cgi?id=1302730644 especially the excellent reference given at the end ...
Thursday, April 14, 2011 at 11:33pm by MathMate

statistics
The director of a health club conducted a survey and found that 23% of memebers used only the pool for workouts. Based on this information, what is the probablity that for a random sample of 10 members, 4 used only the pool for workouts? Please show work Thank you
Monday, June 27, 2011 at 9:46am by Harley

STATISTICS
You have to find the z-score. 65-50 = 15 then divide by 10 which is z = 1.5 You can then use a z-table or a stat calculator to find the probablity less than 65% Depending on the table, you may want to find the probability of z = 1.5 or greater and then subtract that number ...
Monday, February 11, 2013 at 5:31pm by JJ

Statistics
Suppose that about 25% of those called will find and excuse (work, poor health, etc) to avoid jury duty. If 12 people are called for jury duty, what is the probablity that 4 or more will not be available to serve on the jury? Please show work Thank you
Monday, June 27, 2011 at 9:23am by Harley

statistics
Probablity of t greater than or less than A? You have to be kidding, it is near 1.0, not .01. t is either greater than, equal or less than A. If the Prob greater than or less than is .01, the the probability of it being equal to A is .99 Something is wrong with the problem.
Saturday, August 1, 2009 at 8:20pm by bobpursley

binomial distribution
hey, i'd really appreciate some help with this question: A medical treatment is successful 75% of the time. A hospital wishes to treat a group of patients. How many patients should they take so that the probablity that all are cured is 1/10? I know that p=0.75 and q=0.25 ...
Saturday, August 25, 2007 at 9:49pm by elle

algebra ll
What is the probablity of getting two women. WWM MWW WMW three ways, Pr=3*4/10*3/9*6/8 Now what it he prob of getting three women? one way, Pr=4/10*3/9*2/8 Now, add those two probablities.
Sunday, October 26, 2008 at 8:35pm by bobpursley

statistics
This table shows claims and their probablity for an insurance company. AMOUNT OF CLAIM PROBABILITY $0 0.65 $50,000 0.25 $100,000 0.06 $150,000 0.02 $200,000 0.01 $250,000 0.01 1. Calculate the expected value? 2. How much should the company charge as an average premium so that ...
Monday, November 28, 2011 at 9:39pm by Anonymous

college
It depends on when the male is selected. If at birth, then you can use the normal distribution, mean above, with std deviation 4, and you see 85 is just slightly over one standard deviation. But if the male is selected after birth, it changes, and you need to think on that. ...
Thursday, April 29, 2010 at 10:06pm by bobpursley

maths please check my answer
paul orders a pizza. chef carl randomly chooses two different toppings to put on the pizza from the following:~ pepperoni, onion, sausage, mushrooms and anchovies. if paul does not eat pizza with mushrooms, determine the probablity that paul will not eat the pizza that chef ...
Saturday, November 8, 2008 at 9:01pm by Anonymous

math-Probablity
Assuming: 1. he got indeed the 16 questions correctly. 2. the remaining 24 answers were random choices 3. there was exactly one correct answer 4. passing grade is 50% to each of the remaining questions then he will need 4 more correct answers to get 50%. Let p=probability of ...
Tuesday, June 5, 2012 at 3:16pm by MathMate

math
You can rewrite this such that the "OR" applies to mutually exclusive possibilities, and then you can add up the proababilities. The probabilitity of drawing an odd number or a number larger than 6, is the same as drawing one of the odd numbers smaller than 6, or a ...
Wednesday, June 6, 2012 at 5:44pm 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 ...
Saturday, April 25, 2009 at 2:42pm by Count Iblis

math
break it down into cases at most one day of rain in 3 days to me means we could have: norain norain norain ----> (1/3)^3 = 1/27 rain norain norain -------> 2/3(1/3^2 = 2/27 norain rain norain -------> same as above = 2/27 norain norain rain -------&gt...
Thursday, May 17, 2007 at 10:14pm by Reiny

finance
Following are rates of return on a medical equipment company stock, debt, and market portfolio, along with probablity of each state State Prob Ret.on Stock Ret.on Debt Ret.on Market 1 .1 3 8 5 2 .3 8 8 10 3 .4 20 10 15 4 .2 15 10 20 If the company's dept-to-equity ratio is...
Tuesday, April 22, 2008 at 4:11pm by teresa

Finance
Following are rates of return on a medical equipment company stock, debt, and market portfolio, along with probablity of each state State Prob Ret.on Stock Ret.on Debt Ret.on Market 1 .1 3 8 5 2 .3 8 8 10 3 .4 20 10 15 4 .2 15 10 20 If the company's dept-to-equity ratio is...
Friday, April 18, 2008 at 1:59pm by Teresa

finance (Repost)
Following are rates of return on a medical equipment company stock, debt, and market portfolio, along with probablity of each state State Prob Ret.on Stock Ret.on Debt Ret.on Market 1 .1 3 8 5 2 .3 8 8 10 3 .4 20 10 15 4 .2 15 10 20 If the company's dept-to-equity ratio is...
Wednesday, April 23, 2008 at 5:48pm by teresa

Math
Hmmm. I agree with that answer is best, but to get 60 marbles in 150 draws would very seldom happen. In fact, it happens with a frequency of only .0664. Getting exactly 59 or 61 is almost the same...0.0653 and .0569 frequency. http://ncalculators.com/statistics/binomial-...
Thursday, April 4, 2013 at 3:40pm by bobpursley

Pre-Algebra
So since 2/3 of Spinner 1 is sedans (The 3rd is a truck), and 1/2 of Spinner 2 is purple (the other half is a green), write a multipilcation problem to describe the probability of spinning a purple sedan. Write a problem to describe the probability of spinning a purple truck. ...
Thursday, November 8, 2007 at 10:24pm by Ellen

math-Probablity
Hi, just a few stupid questions about probability. 1. How many different license plates can there be if there is a total of 7 letters (no numbers) (and I'm assuming this has a something to do with permutation. 2. How many different batting line ups can be chosen from a 13 ...
Thursday, April 14, 2011 at 11:33pm by Connor

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

For Further Reading