Friday

April 18, 2014

April 18, 2014

Number of results: 77,906

**math**

a box filled with identically shaped balls contains 5 balls with the number 1 on them, 8 balls with the numbers 10 on them, 15 balls with the number 12, and 2 balls with the number 20 on them. If the balls cannot be seen from outside the box, and if one ball is picked at ...
*Wednesday, July 31, 2013 at 11:04am by tg*

**math**

A toy baseball bat comes with 3 plastic balls in a box that is a rectangular solid. The box is just big enough to hold the 3 balls. The radius of the balls is 1.9 in. What is the volume of the air in the box surrounding the balls?
*Sunday, December 20, 2009 at 1:39pm by kate*

**Statistics**

I have two boxes with balls; box #1 and box #2. Box #1 has 3 red balls and 2 blue balls.Box #2 has 7 red balls and 3 blue balls. what is the probability that if a red ball is picked, it is from box #1
*Tuesday, September 13, 2011 at 3:48pm by Paula Arcila*

**Math**

my problem is: From the box containing 5 red balls, 7 blue balls, 10 black balls. you select 4 balls what is the probabilty that EXACTLY 2 balls are black. so i know how to start it c(10,2)c(2,1) ---------- c(22,40 but how do you solve that ?
*Monday, December 13, 2010 at 7:34pm by Katia*

**science**

A box contains 10 balls of which 6 are red (R) and 4 are white (W) . Three balls are taken from the box at random, one after the other. The probability that the 3 balls drawn are in the order RRW is equal to,
*Tuesday, March 27, 2012 at 7:59pm by sajith*

**science**

A box contains 10 balls of which 6 are red (R) and 4 are white (W) . Three balls are taken from the box at random, one after the other. The probability that the 3 balls drawn are in the order RRW is equal to,
*Sunday, July 22, 2012 at 11:47pm by sajith*

**statistics**

A box contains 3 white and 5 black balls. Four balls are drawn at random "with replacement" from the box (i.e. selected balls are returned to the box and mixed, before drawing the next ball). Let X be the number of black balls drawn. What is the distribution of X? What is the ...
*Friday, April 13, 2012 at 12:19am by Anonymous*

**Math**

my problem is: From the box containing 5 red balls, 7 blue balls, 10 black balls. you select 4 balls what is the probabilty that EXACTLY 2 balls are black. i know that you start it/set it up like this: c(10,2)c(2,1) divided by c(22,4) and i can get the answer by plugging it in...
*Monday, December 13, 2010 at 8:17pm by Katia*

**Probability again**

A box contains 6 red balls, 4 blue balls, and 2 green balls. Three balls are randomly drawn (without replacement) from the box. What is the probability that the three balls selected are all the same color?
*Sunday, November 29, 2009 at 7:59pm by Ryan*

**statistics**

Suppose a box has eight differently colored tennis balls in it. The colors are green, blue, red, purple, orange, black, and white. if I will randomly pick out three balls (without replacement), then what is the probability that the balls chosen will be green, yellow, and red (...
*Tuesday, June 12, 2012 at 11:39pm by Sarah*

**math**

A box contain 5 red ball, 3 green balls, and 4 yellow balls. you select two balls from the box at random ( without replacement). What is the probability that both are
*Monday, February 27, 2012 at 1:38am by Anonymous*

**math**

we have box,in box 3 white balls,4 red balls,4 black balls..how i choose 2 black balls and 3 red balls successively?
*Tuesday, September 18, 2012 at 9:31am by kholoud*

**math**

A box contains 8 blue balls and 2 red balls. Three balls are selected from the box at random without replacement. Find the probability that two balls are blue and one ball is red.
*Monday, May 2, 2011 at 5:10pm by Suetusi*

**finite math**

A box contains 14 balls (10 red and 4 white). Three balls randomly drawn out of the box. Determine the following probabilities: P(three red balls)= P(two red and one white)= P(one red and two white balls)= P(three white balls)=
*Monday, July 16, 2012 at 5:16am by preet*

**math**

There are 9 tennis balls in a box, of which only 5 have not previously been used. Four of the balls are randomly chosen from the box. Let ⇠ be the number of new balls among the selected ones. (b) Evaluate the expectation E
*Saturday, March 17, 2012 at 10:10pm by neeks*

**maths-probabilty**

A box contains 5 red balls and 6 black balls. in how many ways can 6 balls be selected so that there are at least two balls of each color?
*Tuesday, March 12, 2013 at 11:51am by anoynomous*

**math**

A box consists of white,yellow,green and black balls, in the ratio 2,3,1,6.Total number of balls are 432.How many yellow balls in the box
*Monday, March 18, 2013 at 10:24am by luthando*

**statistics**

Box A contains 4 red and 6 blue balls. Box B contains 5 red and 10 blue balls. A box is selected at random and a ball is drawn. Find the probability that the ball is blue, given that it came from Box B.
*Wednesday, September 22, 2010 at 8:05am by Lori*

**statistics**

Box A contains 4 red and 6 blue balls. Box B contains 5 red and 10 blue balls. A box is selected at random and a ball is drawn. Find the probability that the ball is blue, given that it came from Box B.
*Wednesday, September 22, 2010 at 11:12pm by Lori*

**Statistics**

Box A contains 4 red and 6 blue balls. Box B contains 5 red and 10 blue balls. A box is selected at random and a ball is drawn. Find the probability that the ball is blue, given that it came from Box B.
*Thursday, September 23, 2010 at 9:12am by Lori*

**math**

A box contains three white balls and two red balls. A ball is drawn at random from the box and not replaced. Then a second ball is drawn from the box. Draw a tree diagram for this experiment and find the probability that the two balls are of different colors.
*Monday, December 27, 2010 at 12:18am by Diana*

**maths-probabilty(urgently needed)**

A box contains 5 red balls and 6 black balls. in how many ways can 6 balls be selected so that there are at least two balls of each color?
*Tuesday, March 12, 2013 at 2:43pm by anoynomous*

**maths**

In an urn, there are several colored balls, with equal numbers of each color. We add 14 balls which are all of the same new color, that is different from those in the urn. It is calculated that the probability of drawing, without replacement, two balls of the same color is the...
*Saturday, June 22, 2013 at 10:37am by Anonymous*

**phy**

In an urn, there are several colored balls, with equal numbers of each color. We add 14 balls which are all of the same new color, that is different from those in the urn. It is calculated that the probability of drawing, without replacement, two balls of the same color is the...
*Sunday, June 23, 2013 at 7:53am by Anonymous*

**math**

A box containing 5 red balls and 3 green balls weighs 43 g. When the box contains 3 red balls and 5 red balls it weighs 37g. When it contains one ball of each it weighs 19g. What is the mass of the box and of each ball.
*Monday, December 3, 2012 at 6:37pm by Bogusgirl*

**MATH Prob.**

A box contains two black balls and three gold balls. Two balls are randomly drawn in succession from the box. a. If there is no replacement, what is the probability that both balls are black? b. If there is replacement before the second draw, what is the probability that both ...
*Thursday, August 6, 2009 at 4:22pm by Twg*

**MATH**

: A box contains two black balls and three gold balls. Two balls are randomly drawn in succession from the box. a. If there is no replacement, what is the probability that both balls are black? b. If there is replacement before the second draw, what is the probability that ...
*Tuesday, December 8, 2009 at 12:53am by Lisa*

**math**

A box contains two black balls and three gold balls. Two balls are randomly drawn in succession from the box. a. If there is no replacement, what is the probability that both balls are black? b. If there is replacement before the second draw, what is the probability that both ...
*Wednesday, December 15, 2010 at 8:22pm by Jenni*

**math**

a box contains more than 25 but fewer than 40 balls.When the balls are counted by 3 there is 1 left over.When the balls are counted by 5 there are 2 left over.How many balls are in the box?
*Sunday, December 2, 2012 at 6:02am by lindy*

**homefield**

There are 9 tennis balls in a box, of which only 5 have not previously been used. Four of the balls are randomly chosen from the box. Let be the number of new balls among the selected ones. (a) Find the probability distribution of : (b) Evaluate the expectation E: (c) ...
*Friday, March 1, 2013 at 8:14am by osman*

**math**

In an urn, there are several colored balls, with equal numbers of each color. We add 14 balls which are all of the same new color, that is different from those in the urn. It is calculated that the probability of drawing , without replacement, two balls of the same color is ...
*Monday, June 17, 2013 at 2:55pm by jack *

**STATISTICS**

There are 10 colored balls in a box ( 5 red, 3 blue, 2 green ). What is the probability of picking out a red ball and then a blue ball ( If I do not replace the red ball )? 1/6 1/2 3/20 4/5
*Monday, June 7, 2010 at 3:17pm by Jake*

**STATISTICS**

There are 10 colored balls in a box ( 5 red, 3 blue, 2 green ). What is the probability of picking out a red ball and then a blue ball ( If I do not replace the red ball
*Wednesday, June 2, 2010 at 5:58pm by Jake*

**math**

A toy baseball bat comes with 3 plastic balls in a box that is a rectangular solid. The box is just big enough to hold the 3 balls
*Sunday, August 8, 2010 at 11:36pm by Anonymous*

**math**

a box contains 5 red and 4 blue balls. In how manys ways can 4 balls be chosen such that there are at most 3 balls of each colour.
*Friday, February 25, 2011 at 5:54pm by michele*

**math**

a. A box contains three white balls and two red balls. A ball is drawn at random from the box and not replaced. Then a second ball is drawn from the box. Draw a tree diagram for this experiment and find the probability that the two balls are of different colors b. Suppose that...
*Saturday, October 9, 2010 at 11:45pm by Anonymous*

**statistics**

1. In a large box are 20 ping-pong balls—10 of them are red and numbered 1 through 10, and the other 10 of them are green and also numbered 1 through 10. Two balls are selected from the box without replacement. 1. a.Find the probability that the first ball selected is red and ...
*Saturday, September 26, 2009 at 7:11pm by John*

**geometry**

A box is filled with 6 cans of tennis balls. If the empty space was filled with sand, how much sand will be needed to fill the box? Each can of tennis balls has a radius of 2 in. Height of box is 12in.
*Wednesday, June 8, 2011 at 10:00am by jean*

**statistic**

nevermind above question, this question please: Suppose there are three balls in a box. On one of the balls is the number 1, on another is the number 2, and on the third is the number 3. You select two balls at random and without replacement from the box and note the two ...
*Thursday, January 12, 2012 at 10:06pm by Stat*

**Geometry**

4 balls each with a radius 1 inch fit snuggly into a 2x2x8 inch box. Is the total volume left over inside the box greater than or less than the volume of a fifth ball? Justify answer. I got as far as figuring the volume of box is 32 cubic inches I'm not sure about the balls?
*Wednesday, May 18, 2011 at 5:18am by JOY*

**probability**

There are two identical boxes of balls. In the first box 2 blue and 5 orange balls, and the second 3 blue and 6 orange balls. Chosen at random from the box and pull out a 1 ball. What is the probability that the ball taken is orange
*Wednesday, August 22, 2012 at 7:20pm by hazard*

**math**

A box A contains 9 red balls and 1 white ball. A box B contain 8 red balls and 1 white ball. A ball is to be taken at random from box A and put into box B. Then a ball is to be taken at random from box B. Find the probability that this ball from box B is white.
*Tuesday, January 5, 2010 at 8:03am by Cindy*

**math**

There are 5 red balls,6 white balls and 7 green balls in a box.If one ball is taken without looking,what is the probability that it is white?
*Sunday, January 27, 2013 at 8:44am by Amber lynn V. Lumayao*

**probability**

A total of n balls are to be put into k boxes with conditions that there will be n1 balls in box 1 ,n2 balls in box2 and so on. With nkballs being placed in box k(n1+…..+nk = n)Explain why the number of ways of doing this is n!/n1!*….*nk!. Explain why this is just n C n1 =n C...
*Tuesday, February 2, 2010 at 12:10pm by aroah*

**Math**

Probability-- There are two boxes...the first box has 3 black balls and 1 blue ball in it. The second box has 6 black balls and 2 in blue balls in it. a. Which of the following two boxes would you choose if you were picking 1 ball and wanted black? Justify your answer. b. Then...
*Tuesday, November 12, 2013 at 10:25am by Anonymous*

**Math/Statistics**

I don't get how to do this...can anyone help? 1. In a large box are 20 ping-pong balls—10 of them are red and numbered 1 through 10, and the other 10 of them are green and also numbered 1 through 10. Two balls are selected from the box without replacement. 1. a.Find the ...
*Sunday, September 27, 2009 at 7:23am by John*

**math**

You have seven balls labelled 1,2,…,7 and seven unlabelled, indistinguishable boxes. How many different ways can the balls be placed into the boxes? Details and assumptions Since the boxes are indistinguishable, putting all 7 balls into one box is the same as putting all 7 ...
*Monday, June 24, 2013 at 12:56pm by anonymous*

**mathematics**

a box contains 2 white and 3 blue balls.two balls are picked at random,one after the other without replacement.what is the probof picking two balls of different colours?
*Sunday, March 27, 2011 at 12:54pm by tobi*

**Chemistry**

Why does scientist want to demostrate chemical bonding use models with colored balls to represent atoms. Balls arenot totally accurate. So why does scientist use them?
*Wednesday, May 23, 2012 at 1:51am by Kim*

**Probability**

Roberto has 10 different colored sheets of paper and 3 different colored envelopes. How many different letters can he make consisting of one colored sheet of paper and one colored envelope??? Please explain!
*Friday, May 11, 2012 at 7:43pm by Mack*

**math**

A box contains 6 red balls, 4 white balls, and 5 green balls. If three balls are drawn in succession without being replaced, what is the probability that they are drawn in the order red, white, green?
*Monday, April 25, 2011 at 11:05am by Lo*

**Math**

A box contains 2 white calls and 7 pink balls. Two balls are drawn at random from the box. a) If the first ball is drawn and not replaced, what is the probability that two balls will be drawn of different colors? b) If the first ball is drawn and then put back, what is the ...
*Monday, January 10, 2011 at 2:26pm by Nicole*

**Math**

A box contains 20 red balls and 40 green balls . Four balls are randomly selected from the box without replacement. What is the probability of selecting a red ball followed by a green ball and then another red ball followed by a green ball?
*Wednesday, January 22, 2014 at 7:32pm by Kristen*

**STATISTICS**

6. A bowl contains 10 red balls, 10 green balls and 10 white balls. a. What is the probability of drawing 2 white balls with replacement? b. What is the probability of drawing 2 white balls without replacement?
*Wednesday, June 2, 2010 at 5:58pm by ray nicholson*

**math**

A basket contains 15 red numbered balls and 10 white numbered balls. A sample of five balls is selected. How many samples contain three red balls and two white balls? Explain your answer.
*Monday, March 18, 2013 at 9:56am by alice*

**math**

a box contains more than 25 but less than 40 balls.when we counted by 3 there are 1 left over,when we counted by 5 there are 2 left over.how many balls are there in the box ? please explain how you work it out,thanks
*Sunday, December 2, 2012 at 5:29pm by charlie*

**math **

6. A bowl contains 10 red balls, 10 green balls and 10 white balls. a. What is the probability of drawing 2 white balls with replacement? b. What is the probability of drawing 2 white balls without replacement?
*Monday, February 13, 2012 at 6:34am by sharon*

**8th Grade Probability**

A box contains 6 red balls, 4 white balls, and 5 green balls. If three balls are drawn in succession without being replaced, what is the probability that they are drawn in the order red, white, green?
*Monday, February 14, 2011 at 2:10pm by Elizabeth*

**Finite Math-Probability**

Suppose we have an urn with 10 white balls and 6 red balls, and we create an experiment by randomly selecting 6 balls from the urn. a) What is the probability that the sample has the same number of white balls as red balls? b) What is the probability that there are more red ...
*Saturday, November 24, 2012 at 5:05pm by Em*

**MATH 157**

Can anyone please help me understand these math problems. #4. How many three-symbol codes (letter-number-number)can be made from the letters S, P, Y, and two-digits from the set of (0, 1, 2,..., 9) without repetition? #16. A pair of dice are rolled and the sum on their ...
*Wednesday, August 4, 2010 at 12:46am by Rayna *

**Probability again**

A bag contains 5 yellow balls, 5 orange balls, 6 white balls and 6 red balls. Five balls are drawn and NOT replaced each time
*Sunday, November 29, 2009 at 7:59pm by ali*

**Math**

John has a box that contains one red ball and one blue ball. Every minute he reaches into the box and randomly takes out a ball from it (without looking). No matter which ball he took out, he puts it back together with another ball of the same color. Thus, after n minutes, the...
*Monday, July 1, 2013 at 12:30pm by Alex*

**math**

John has a box that contains one red ball and one blue ball. Every minute he reaches into the box and randomly takes out a ball from it (without looking). No matter which ball he took out, he puts it back together with another ball of the same color. Thus, after n minutes, the...
*Friday, July 5, 2013 at 6:35am by GT*

**d**

given piles of identical red, blue and green balls where each pile contains at least 10 balls, how many ways can 10 balls be selected such that exactly two green balls are selected and at most one red ball is selected?
*Sunday, June 16, 2013 at 6:10pm by Anonycmous*

**math ms sue please help, PLEASE!!!!**

tori had 20 gumballs in a bag. there were 2 red gum balls, 3 blue gum balls, 5 yellow gum balls, and 10 purple gum balls. what was the ratio of blue gum balls to total number of gum balls?
*Wednesday, November 13, 2013 at 6:15pm by math help*

**Math**

At the school store, colored pencils are reduced from $2.40 a box to $2.00 a box. What is the percent of decrease?
*Friday, January 6, 2012 at 1:39am by Martha*

**maths **

A box contains 20 balls, of which 5 are red, 5 are blue, 5 are white and 5 are green. Suppose a sample of 5 balls are chosen without replacement. a) find the probability that the sample contains balls of all the same colour (answer is 4/ 20C5, but why isnt it 5/20C5??) b) find...
*Thursday, October 11, 2012 at 9:38am by Candice*

**Statistics - math**

An urn contains 5 red balls and 10 white balls. 6 balls are randomly drawn and not replaced. What is the probability that 3 or fewer balls drawn are red?
*Tuesday, October 2, 2012 at 5:25pm by Gina*

**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**

Tom has a bag filled with 10 green balls, 5 red balls and 5 blue balls, what part on toms bag has green balls
*Tuesday, April 23, 2013 at 11:37pm by Gio*

**Math**

"In vase A, there are 3 red balls and 5 white balls. In vase B, there are 6 red balls and 4 white balls. Two balls are to be drawn at random, without replacement, from each vase. What is the probability of selecting 4 red balls?" (Answer: 1/28) So I thought about doing 4 cases...
*Monday, May 3, 2010 at 8:45pm by Stuck*

**Geometry**

Wow, those are some huge tennis balls. anyway.... making some assumptions: there are 3 balls in a can the box is filled with cans in a 3by2 arrangement. radius of one can= 2 height of can = 12 , (3 times the diameter) volume of one can = π(2^2)(12) = 48π so volume of...
*Thursday, June 9, 2011 at 1:51am by Reiny*

**statistics**

total balls = 10 without replacement, so you'll have one less ball each time you draw I'll do the first one for you. You can figure out how to the rest. P(both black) = (6/10)(5/9) Explanation: During the first draw, there are 6 black balls and a total of 10 balls. During the ...
*Saturday, May 21, 2011 at 10:16am by TutorCat*

**college physics**

Three glass Christmas balls become electrically charged when Noel removes them from the packaging material in their box. Noel hangs the balls on the tree 0.2m apart at an angle of 60 degree from each other. If each ornament has aquired a charge of 2 x 10^-10C, What is the ...
*Saturday, July 31, 2010 at 5:05pm by Cristina*

**Statistics**

A box contains four balls labeled 1,2,3,4 respectively. Two balls will be sequentially selected from the box at random without replacement. Let Y1 be the maximum of two outcomes and Y2 be the minimum of two outcomes observed. Find the joint probability function of Y1 and Y2.
*Friday, February 10, 2012 at 2:11pm by Ed*

**Math for the middle school and elementary teacher**

3 red balls, 4 green balls, and 5 yellow balls are in a bag. If 2 balls are drawn randomly (without replacement) find the probability that the balls are different colors. I got 47/66 that the balls are different colors...is that right?
*Tuesday, February 28, 2012 at 9:51pm by liz*

**Statistics**

3 balls are drawn successively from a box containing 6red,4 white and 5 blue balls.Find the probability that they are drawn in order red,white and blue if:(a)each ball is replaced.(b)balls are not replaced
*Sunday, January 20, 2013 at 5:06am by Rose*

**Statistics**

A box contains five numbered balls (1,2,2,3 and 4). We will randomly select two balls from the box (without replacement). (a) The outcome of interest is the number on each of the two balls we select. List the complete sample space of outcomes. (b) What is the probability of ...
*Tuesday, March 12, 2013 at 1:06pm by Randy*

**Math**

Four balls are simultaneously picked at random from a jar containing 2 red balls, 2 green balls, and 6 yellow balls. What is the probability that exactly two of the selected balls will be red?
*Monday, November 15, 2010 at 10:05pm by Molly*

**math**

1. First ball was red No. of red balls: 2 Total number of balls:5 P(R)=2/5 2. First ball was white No. of white balls: 3 Total number of balls: 5 P(W)=3/5 3. Second ball was red: The probability is given by P(R,R)+P(W,R) Now we'll calculate P(R,R) P(R)=2/5 After the first red...
*Thursday, September 9, 2010 at 12:30pm by MathMate*

**MATH**

There are 5 red and 4 black balls in a box. If three balls are picked without replacement, what is the probability that at least one of them is red?
*Monday, July 11, 2011 at 8:26pm by James*

**Discrete Math**

A box contains 55 balls numbered from 1 to 55. If 8 balls are drawn with replacement, what is the probability that at least two of them have the same number?
*Wednesday, April 27, 2011 at 3:33pm by Nick*

**math**

A box contains 55 balls numbered from 1 to 55. If 15 balls are drawn with replacement, what is the probability that at least two of them have the same number?
*Monday, October 22, 2012 at 1:53am by Anonymous*

**FINITE**

selection of colored balls from two bags. Assume that each bag contains 4 balls. Bag a contains 2 red and 2 white, while bag b contains 2 red, 1 white, and 1 blue. You randomly select one ball from bag a, note the color, and place the ball in bag b. You then select a ball from...
*Wednesday, February 16, 2011 at 12:12am by Hil-hellpp!*

**A NEW ANSWER!**

Try to tell them to draw or make animals that belongs to air, water and land on a different piece of paper or box (Use colored paper or tell them to buy them.)In a box or on a box (painting if the student/s an expert at painting.)
*Saturday, October 31, 2009 at 4:25pm by WS*

**Math**

There are 10 tennis balls, 2 soccer balls, and 8 basketballs. What fraction in simplest form are tennis balls?
*Wednesday, October 24, 2012 at 8:46pm by Jennifer*

**Geometry**

A box is filled with 6 cans of tennis balls. If the emply space was filled with sand, how much sand is needed to fill the box? Each can has a radius of 2 in. Height of box is 12in.
*Thursday, June 9, 2011 at 1:51am by jean*

**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*

**statistics**

Two urns each contain yellow balls and black balls. Urn 1 contains 2 yellow balls and 6 black balls. urn2 contains 2 yellow balls and 5 black balls. A ball is drawn from each urn. What is the probability that both balls are yellow? Please show me how do do this math problem.
*Wednesday, March 12, 2008 at 7:36pm by cortnie*

**STATISTICS**

a. Probability of drawing a white ball is 10(number of white balls)/ 30 (total number of balls) since the balls are replaced, the probability remains the same for the second ball, that is 10/30. To determine probability of drawing balls with replacement is found by multiplying...
*Wednesday, June 2, 2010 at 5:58pm by Kevin*

**geometry**

f(n) = n(n+1)/2 The numbers produced by f(n) are called the triangular numbers. Have you ever noticed the number of balls in setting up the triangle in billiards? sum of balls in first row : 1 sum of balls after 2 rows: 3 sum of balls after 3 rows : 6 sum of balls after 4 rows...
*Friday, November 5, 2010 at 9:48pm by Reiny*

**maths**

prob(white) = 4/10 = 2/5, prob(red) = 6/10 = 3/5 no white balls --- (3/5)^4 = 81/625 one white ball -- C(4,1) (2/5) (3/5)^3 = 216/625 two white balls -- C(4,2) (2/5)^2 (3/5)^2 = 216/625 three white balls -- C(4,3) (2/5)^3 (3/5) = 96/625 four white balls -- (2/5)^4 = 16/625 ...
*Tuesday, February 19, 2013 at 6:04am by Reiny*

**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**

Okay - this is the first time I've ever tried to use Bayes Theorem... P(A|B) = P(B|A).P(A) / Sum(P(B|Aj).P(Aj) Let A be the event "All five balls are white". Let Aj be the event "There are exactly j white balls". Let B be the event "I draw two white balls". Then P(A|B) = P(All...
*Friday, August 31, 2012 at 11:25am by David Q/R*

**math 157**

A box contains three black balls and two golden balls. A ball is selected at random, it's color is recorded and it is then replaced. A second ball is selected at random, it's color is recorded it is then replaced. The outcome is associated with this type of selection is an ...
*Saturday, January 9, 2010 at 5:49pm by Rmz*

**Conditional Probability**

A box contains 1 green ball, 2 blue balls, and 3 red balls. These balls are selected at random, one after another without replacement, and their colors are noted. Find the conditional probability that the third ball is red given exactly one ball is red.
*Thursday, September 20, 2012 at 8:27pm by Sarah*

**math problem**

************ *********** ********** ********* ******** ******* ****** ***** **** *** ** * The above figure shows the bottom layer of the pyramid, which has 1+2+3+4+5+6+7+8+9+10+11+12=78 balls The next layer will have one row less, namely 1+2+3...11=66 and so on until the first...
*Saturday, September 5, 2009 at 9:08pm by MathMate*

**Math**

A ball pit contains 10 yellow balls and 14 green balls. What is the probability of randomly picking 3 green balls (replacing them), from the pit? 3/24
*Wednesday, January 15, 2014 at 6:33pm by Crystal*

**combination,Math**

This amounts to coloring 9 balls with 4 colors. We can represent a coloring as a string of 9 o's and 3 |'s. E.g. 000|00|000|0 represents 3 balls with color 1, 2 balls with color 2, 3 balls with color 3 and 1 ball with color 4. The number of different strings you can make is: ...
*Tuesday, October 8, 2013 at 8:44pm by Count Iblis*

**math**

For this problem, assume the balls in the box are numbered 1 through 9, and that an experiment consists of randomly selecting 3 balls one after another without replacement. What probability should be assigned to the event that at least one ball has an odd number?
*Monday, September 13, 2010 at 10:22pm by Laura*

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