Number of results: 54,226

**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

*June 2, 2010 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 )? 1/6 1/2 3/20 4/5

*June 7, 2010 by Jake*

**maths**

there are six red balls and nine blue balls in a box.a ball is selected at random.find the probability that the ball is (a)red(b) blue ( c) red of blue

*May 2, 2014 by joyce Rowley*

**maths**

there are six red balls and nine blue balls in a box.a ball is selected at random.find the probability that the ball is (a)red(b) blue ( c) red or blue

*May 2, 2014 by joyce Rowley*

**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.

*September 20, 2012 by Sarah*

**Math**

Assume that you are drawing two balls without replacement from an urn that contains 13 green balls, 10 blue balls, and 1 red ball. What is the probability that you will draw a blue balls and a red ball?

*June 12, 2014 by Sarah*

**math**

A ball is draw at random form a box containing 6 red balls, 4 white balls and 5 blue balls. what is the probability that the ball drawn is (1)red (2)white (3)blue (4)red or blue

*January 13, 2016 by biliyaminu*

**math**

I have 3 balls in a box, one red, one blue, and one green. Am I more likely to draw a red ball followed by a green ball or a blue ball among the first two balls to be drawn?

*February 22, 2016 by Terri*

**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.

*September 22, 2010 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.

*September 22, 2010 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.

*September 23, 2010 by Lori*

**Math**

A box contains some red balls and some blue balls. There are four more blue balls than red balls. A ball is removed at random, replaced and a second ball randomly removed. The probability that the two balls are different colours is 21/50. How many balls of each colour are in ...

*November 10, 2016 by Courtney*

**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

*September 13, 2011 by Paula Arcila*

**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.

*May 2, 2011 by Suetusi*

**College Finite Math**

Your Open QuestionShow me another » If the ball is either blue or white, what is the probability that it was drawn from urn Y? Assume that you randomly pick one of the urns: X, Y, or Z. You then randomly draw one ball out of the selected urn and note its color. The urns ...

*April 2, 2009 by Nahla*

**Probability -- Help?**

Sampling one at a time with replacement from a bag with 8 blue, 7 red, and 5 green. What is the probability of getting at least two red in 3 draws? The book says the probability is 0.2818 but doesn't explain why. Any help???? Unfortunately, the probability of picking 3 red ...

*December 1, 2006 by Cheri*

**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...

*July 1, 2013 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...

*July 5, 2013 by GT*

**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?

*January 22, 2014 by Kristen*

**probability**

A jar contains 3 red balls and 2 green balls. You draw one ball at random. Determine the probability of selecting a. red b. green c. blue d. red or green

*March 17, 2011 by Evangelina*

**math**

Consider a box that contains 14 red balls,12 blue balls and 9 yellow balls.A ball is drawn at random and the color is noted and then put back inside the box.Then,another ball is drawn at random.Find the probability? a.both are blue b.both balls are yellow c.the first is red ...

*January 5, 2017 by Anonymous*

**Math**

A bag contains four balls. Three are red, and the fourth is either red or blue, selected with equal probability. A ball is drawn from the ball and it is red. What is the probability that one of the balls still in the bag is blue?

*November 7, 2010 by kyle*

**statistics**

A jar contains 7 red balls, 5 green balls, 4 blue balls, and 3 white balls. A sample of size 7 balls is selected at random without replacement . Find t the probability that sample contains two red balls, 2 green balls, 2 blue balls, and 1 white ball.

*December 26, 2014 by kp*

**stats**

A box contains 10 red balls and 20 blue balls. Three balls are selected at random one after the other from the box, without replacement. If the first two balls selected are both blue, what is the probability that the third ball selected is red?

*February 7, 2015 by larry*

**pshs**

three balls are drawn successively from a box containing 6 red balls,4white balls and 5 blue balls. find the probability that tare hey drawn in the order red,white and blue if each ball is replaced?

*March 4, 2015 by sagar*

**statistics**

An urn contains 4 blue balls, 5 yellow balls and 7 red balls. if a single ball is selected, find the probability thet the ball is Red? Not blue? blue or yellow

*February 15, 2011 by Andrea*

**MATH**

Tony has a bucket filled with 10 green, 3 blue, 1 red, and 7 yellow tennis balls. He removes 4 tennis balls from the bucket, without replacement. Which of the following outcomes could represent this selection? A. All of the tennis balls are blue. B. There is 1 tennis ball of ...

*May 11, 2016 by roma*

**maths**

Tony has a bucket filled with 10 green, 3 blue, 1 red, and 7 yellow tennis balls. He removes 4 tennis balls from the bucket, without replacement. Which of the following outcomes could represent this selection? A. All of the tennis balls are blue. B. There is 1 tennis ball of ...

*May 13, 2016 by roma*

**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...

*February 16, 2011 by Hil-hellpp!*

**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 (...

*June 12, 2012 by Sarah*

**match**

a bowl contains 6 red,12 green and a number of blue ball.How many blue ball are in the if the probability of choosing a red ball in 1/6

*November 8, 2015 by Aldred*

**Statistics**

A bowl contains 3 red balls, 2 blue balls and 5 white balls. A ball is selected and the color noted. Then it is replaced. A second ball is selected and its color noted. Find the probability of getting a red ball and a blue ball.

*November 18, 2010 by Maryan*

**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 ...

*September 26, 2009 by John*

**math**

There are 3 red balls and 7 blue balls in Bowl A, and 8 red balls and 2 blue balls in Bowl B. Mandy rolls a die and if a prime number is up, Bowl A is selected; otherwise Bowl B is selected. Then Katie draws a ball randomly from the selected bowl. Find the probability of Bowl ...

*February 20, 2017 by Andrew*

**math plz help**

The contents of a jar holds 4 red marbles, 7 blue marbles, and 5 green marbles from which you select marbles at random. What is the probability of selecting a red marble, replacing it, and then selecting a blue marble? Show your your work. Is it 4/16 for picking red then 7/16 ...

*April 16, 2015 by Pink*

**probability**

A jar contains 3 red balls and 2 green balls. You draw one ball at random. Determine the probability of selecting a. red b. green c. blue d. red or green p.s: the reason I am asking this questions is because we never learned about it in class and I don't know how to do it; so ...

*March 17, 2011 by Evangelina*

**maths**

there are 8 red, 6 green, 10 blue marbles in a bag. A child keeps picking a ball at random and all marbles are equally likely to be picked. calculate the probability of picking a red marble

*November 8, 2016 by pretty*

**Math**

Many has two boxes one contains 10 colored pencils 4 of witch are red and 6 which are green the other box onther box contains 7 markers and which 4 are red and 3 are blue what's the probability of of many choosing green green pencil and red marker

*May 30, 2016 by Frank*

**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 ?

*March 8, 2012 by Rajit Rastogi*

**physics**

A red ball is thrown down with an initial speed of 1.2 m/s from a height of 25.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 22.9 m/s, from a height of 0.8 meters above the ground. The force of ...

*September 3, 2012 by ali*

**Physics**

A red ball is thrown down with an initial speed of 1.3 m/s from a height of 28.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 24.7 m/s, from a height of 0.8 meters above the ground. The force of ...

*January 26, 2013 by Funnyguy*

**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...

*November 12, 2013 by Anonymous*

**maths**

The probability of getting a blue ball is 2/3 from a bag containing 6 blue and 3 red balls. 12 red balls are added to the bag then find the probability of getting a blue ball

*March 10, 2011 by susan*

**probability theory**

3 students; A, B and C, are in a swimming race. A and B have the same probability of winning and each is twice as likely to win as C. Find the probability that B or C wins the swimming race. 3) Given three boxes as follows: Box A contains 3 red, 2 white and 2 blue balls. Box B...

*November 20, 2015 by charles*

**math**

Hitomi has a total of 30 red and blue bowling balls ate her bowling alley. Each red ball weighs 8 lb. Each blue ball weighs 9 lb. If the total mass of the blue balls is 49 lb. heavier than the total mass of the red balls, how many red balls does she have?

*March 2, 2011 by anna*

**Math**

What is the probability of choosing a red or blue gum ball from a bag that contains 14 red, nine blue, and 12 green gumballs.

*March 26, 2016 by Gina*

**7th grade math (probability)**

I'm posting corrections from yesterday in addition to new ones. Still not sure how to answer #4. 2. Edwin rolls a number cube and then spins a color from a color card (red, yellow, blue, green, white). What is the probability that he will roll an even number and choose a red ...

*May 6, 2015 by Alexis*

**math**

A bag contains 11 red balls, 9 blue balls and x yellow balls. The probabilty of choosing a yellow ball at random is 1/6. What is the probability of not getting a blue ball.

*November 19, 2013 by danial*

**7th grade math (probability)**

I'm re-posting corrections originally from Wednesday in addition to new ones. Still not sure how to answer #4. 2. Edwin rolls a number cube and then spins a color from a color card (red, yellow, blue, green, white). What is the probability that he will roll an even number and ...

*May 8, 2015 by Alexis*

**statistics**

If a bag contains a set of 20 red balls, 10 green balls, and 15 black balls, then what is the possiblity of selecting (in this order) a red ball, a green ball, and a red ball. Without Replacement of the items selected. Can you explain how you get the answer? Thank you

*September 12, 2012 by Cheryl*

**college**

A blue ball is thrown upward with an initial speed of 19.8 m/s, from a height of 0.5 meters above the ground. 2.4 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 7.9 m/s from a height of 22.5 meters above the ground. The force of ...

*September 3, 2012 by ali*

**Pre-Algebra**

Two urns each contain green balls and blue balls. Urn I contains 4 green balls and 6 blue balls, and Urn II contains 6 green balls and 2 blue balls. A ball is drawn at random from each urn. What is the probability that both balls are blue? A. 2/15 B. 3/20 C. 1/10 D. 4/153

*November 5, 2015 by Dakota*

**Please Help!!! Algebra...**

Two urns each contain green balls and blue balls. Urn I contains 4 green balls and 6 blue balls, and Urn II contains 6 green balls and 2 blue balls. A ball is drawn at random from each urn. What is the probability that both balls are blue? A. 2/15 B. 3/20 C. 1/10 D. 4/153

*November 5, 2015 by Dakota*

**math**

if a bag has 2 red balls 2 blue balls 2 green balls what is your chance of getting a red ball

*September 3, 2014 by Anonymous*

**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

*August 22, 2012 by hazard*

**math**

Hitomi has a total of 30 red and blue bowling balls at her bowling alley. Each red ball weighs 8 lb. each blue ball weighs 9 lb. If the total mass of the blue balls is 49 lb. heavier than the total mass of the red balls, how many red balls does she have???

*March 1, 2011 by Katherine*

**math**

Hitomi has a total of 30 red and blue bowling balls at her bowling alley. Each red ball weighs 8 lb. Each blue ball weighs 9 lb. If the total mass of the blue balls is 49 lb. heavier than the total mass of the red balls, how many red balls does she have?

*March 3, 2011 by Katherine*

**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...

*May 3, 2010 by Stuck*

**phy**

A blue ball is thrown upward with an initial speed of 20.6 m/s, from a height of 0.8 meters above the ground. 2.5 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 8.2 m/s from a height of 23.7 meters above the ground. The force of ...

*September 13, 2011 by a*

**statistics**

Assume that each bag contains 6 balls. Bag a contains 3 red and 3 white, while bag b contains 2 red, 2 white, and 2 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 bag b at random and make note of its ...

*October 4, 2010 by Tiff*

**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?

*June 16, 2013 by Anonycmous*

**Pre Algebra Probability**

Each of two urns contains green balls and red balls. urn 1 contains 10 green balls and 14 red balls. urn 2 contains 4 green balls and 11 red balls. if a ball is drawn from each urn what is p(red and red)? BTW- i really don't know what an urn is, i guess a basket or some small ...

*April 13, 2015 by basketball&batman*

**probability**

You have a bag with 3 red, 3 white, and 2 blue balls in it. You draw three balls without replacement. What is the probability that the 3rd ball chosen is blue?

*November 22, 2015 by Anonymous*

**physics**

Each croquet ball in a set has a mass of 0.45 kg. The green ball, traveling at 12.6 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a friction- less surface and all collisions are head-on, find the final speed of the blue ball in each of the ...

*January 5, 2010 by Anonymous*

**physics**

A red ball is thrown down with an initial speed of 1.0 m/s from a height of 27.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 24.5 m/s, from a height of 0.7 meters above the ground. The force of ...

*August 27, 2012 by David*

**math**

In a box there are 3 red, 3 blue and 3 green balls. If 3 balls are picked from the box randomly, one by one, with replacement, what is the probability that none of them will be blue?

*December 21, 2014 by protik*

**Math**

I have my answers but need them checked and i probably got them wrong so if you can please explain. #1: Which of the following sample spaces correctly lists all the possible outcomes for flipping a coin and spinning a four-colored spinner (red, blue, green, and yellow)? (A) H-...

*May 23, 2016 by Leilynn22*

**math**

There are 25 red beads,x blue beads and y green beads in a box.When a bead is picked at random,the probability that it is blue is 1 over 4 and the probability that it is green is 1 over 3. (a)Find the value of x and y. (b)How many blue beads must be added so that the ...

*July 7, 2014 by mandy*

**statistics**

A jar contains 2 red balls, 2 blue balls, 2 green balls and 1 orange ball. Balls are randomly selected, without replacement, until 2 of the same colour are obtained. Calculate the probability that more than 3 balls must be selected.

*August 7, 2014 by Koala*

**statistics**

A jar contains 2 red balls, 2 blue balls, 2 green balls and 1 orange ball. Balls are randomly selected, without replacement, until 2 of the same colour are obtained. Calculate the probability that more than 3 balls must be selected.

*July 2, 2016 by peter*

**Math**

A bag contains 6 blue balls, 4 green and 2 red. If you put your hand in and picked a ball at random what are the chances it is blue?

*February 1, 2012 by Anonymous*

**statistics**

a bag contains 10 red balls and 7 blue balls.a ball is drawn at random.the probability that ball drawn is red is

*October 12, 2015 by ahsan*

**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

*January 20, 2013 by Rose*

**Math**

a box contains red markers ,blue markers amd green markers . there are more blue makers than red .the probability of randomly selecting a blue marker from the box is 1/5 . that is a possible probability that a randomly selected marker from he box is red?

*March 22, 2017 by Jordan bell*

**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?

*November 29, 2009 by Ryan*

**Maths**

There are 3 green balls,5 red balls and 2 yellow balls in a bag.You take out one without looking.What is the probability of picking out a yellow ball?

*March 13, 2014 by Sibongakonke*

**math**

A box contained some red, blue, and green markers. For every 5 red markers, there were 2 blue markers. For every 3 blue markers, there were 5 green markers. a. Find the ratio of red markers to blue markers to green markers. b. When 6 red markers were removed from the box,3/7 ...

*March 26, 2015 by austin*

**Finite**

Assume the box contains 7 balls: 3 red, 2 blue, and 2 yellow. A ball is drawn and its color noted. If the ball is yellow, it is replaced; otherwise, it is not. A second ball is then drawn and its color is noted. What is the probability that the first ball was yellow, given ...

*November 15, 2011 by Athena*

**Math**

There are blue red and green buttons in a box. The ratio of blue to red buttons is 3:4. There are 12 more green buttons than blue buttons. 6 blue buttons and 1/3 of the green buttons were removed from the box. The number of buttons removed were replaced by the same number of ...

*November 9, 2016 by Hwee*

**Math**

A box contains some white balls and some blue balls. There are 5 more blue balls than white balls. One ball is removed at random and not replaced. A second ball is then removed at random. The probability that the balls are different colours is 52/105. Find the probability that...

*November 10, 2016 by Courtney*

**Statistics**

An urn contains three yellow,four green and five blue balls. Two balls are randomly drawn without replacement. Find the probability of the following events: a.both balls are blue. b.the first ball is green and the second yellow. c.there is one green and one yellow ball

*November 18, 2015 by Dominiq*

**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.

*December 3, 2012 by Bogusgirl*

**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.

*November 25, 2015 by Zeisha Khan*

**stats**

A jar contains 7 black balls and 25 red balls. You take 2 out without replacing them. Find a)the probability of drawing 2 red balls in a row, b) the probability of drawing a red ball, then a black ball, c) the probability that the two balls will be of different colors

*December 18, 2014 by Sally*

**Algebra.. PLEASE help me!!**

Robin tosses a fair coin and then draws a ball from a bag that contains one red, one blue, and one green ball. PART A: What are the possible outcomes for the experiment? Explain. PART B: Three balls-one red, one blue, and one green-are added to the bag. Will the total number ...

*April 11, 2013 by Syram*

**Maths**

a box contains 3 black balls , 7 white balls and 5 red balls . one ball is lost . the probability that a red ball is drawn is 2/7 . The colour of the lost ball is

*July 14, 2015 by Mona*

**Math help?**

I am kind of stuck on this one Each of two urns contains green balls and red balls. Urn I contains 10 green balls and 8 red balls. Urn II contains 3 green balls and 10 red balls. If a ball is drawn from each urn, what is P(red and red)? (a) 23/18 (b) 10/27 (c) 40/117 (d) 18/31...

*April 23, 2015 by plz*

**math**

If I have 25 balls in a bowl 10 black,5 blue ,5 green ,5 red . what is the probability of me pulling out a red? 1/5 ,4/5,2/10,1/25 etc....

*December 7, 2012 by robert*

**Another math related question**

Two urns both contain green balls and red balls. Urn 1 contains 6 green balls and 4 red balls and urn 2 contains 8 green balls and 7 red balls. A ball is drawn from each urn.What is the probability that both balls are red

*June 7, 2015 by Anonymous user*

**Physics**

Which combination of primary additive colors will produce yellow-colored light? green and blue blue and red red and green cyan and magenta

*October 26, 2012 by oehtiwh*

**Physics**

Which combination of primary additive colors will produce yellow-colored light? green and blue blue and red red and green cyan and magenta

*October 26, 2012 by Hola*

**Physics**

Which combination of primary additive colors will produce yellow-colored light? green and blue blue and red red and green cyan and magenta

*October 29, 2012 by Confused*

**Math**

A box contained some red, blue, and green markers. For every 3 red markers, there were 2 blue markers. For every 3 blue markers, there were 7 green markers. A) Find the ratio of red markers to blue markers to green markers. B) When 7 markers were removed from the box, 1/4 of ...

*April 17, 2016 by Anonymous*

**6th grade math quiz**

1. Which of the following sample spaces correctly lists all the possible outcomes for flipping a coin and spinning a four-colored spinner (red, blue, green, and yellow)? A. H-red, H-blue, H-green, H-yellow, T-yellow, T-green, T-blue, T-red B. H-red, T-red, H- blue, T-blue, H-...

*May 13, 2016 by Lily Longoria*

**finite math**

6 red balls, 5 black balls, 4 green balls, what is probability, 1 red ball and one black ball pick, with replacing ball

*May 2, 2012 by cindy*

**maths-probability**

A box contains n balls of which 2 are red and the rest are green. Two balls are to be selected at random one after the other from the box without replacement. If the probability of selecting 2 red balls is 1/28, find; the value of n the probability that a red is selected ...

*February 24, 2015 by imoro*

**math**

On the plant ZOG,colored coins are used formoney. Suppose 12 white, 9 red, 8 yellow, 4 blue, and 0 green can be exchanged for 2 white, 1 red, 0 yellow, 1 blue ,and 1 green. Also, suppose 1 green = N blue, 1 blue = N yellow, 1 yellow = N red, and 1 red = N white coins. What is ...

*September 16, 2008 by Anna*

**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 ...

*September 27, 2009 by John*

**probability**

A box contains n balls of which 2 are red and the rest are green. Two balls are to be selected at random one after the other from the box without replacement. If the probability of selecting 2 red balls is 1/28, find; the value of n the probability that a red is selected ...

*February 24, 2015 by imoro*

**Probability**

A drawer contains six bags numbered 1-6, respectively. Bag i contains i blue balls and 2 green balls. You roll a fair die and then pick a ball out of the bag with the number shown on the die. What is the probability that the ball is blue? Thank you!

*January 27, 2012 by Erica*