# Probabilit

Three marbles are drawn without replacement from an urn containing 4 red marbles, five what marbles, and two blue marbles. Determine the probability that None is red

1. 👍 0
2. 👎 0
3. 👁 81
1. 4 red out of (4+5+2)=11 marbles
Probability that first draw has no red
=(11-4)/11
=7

No replacement, so probability for second draw
= (10-4)/10
=6/10

Probability that both have no red
= product of the two probabilities.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### URGENT

An urn contains a total of 9 marbles out of which 2 are red, 3 are white, and the remaining are blue. Two marbles are drawn out of the urn in succession. What is the probability that both marbles are the same color if: a.

asked by Suhayla on November 10, 2015
2. ### Math-Probability

Suppose an urn contains 8 red,5 white and 7 blue marbles.If 3 marbles are drawn at random from the urn with replacement,what is the probability that three marbles are the same color?Give answer in a reduced fraction.

asked by Melina on November 14, 2013
3. ### Math

Suppose an urn contains 8 red,5 white and 7 blue marbles.a.If 3 marbles are drawn at random from the urn with replacement,what is the probability that three marbles are red?

asked by Leonard on November 15, 2013
4. ### Math

A bag contains 4 green marbles, 6 red marbles, and 2 white marbles. Three marbles are drawn at random with replacement. With replacement means that after a marble is drawn, it is replaced before the next one is drawn. Find the

asked by Junior on May 18, 2012
5. ### Mathematics

There are 2 white marbles in urn A and 4 red marbles in urn B . At each step of the process a marble is selected from each urn and the 2 marbles are interchanged.What is the probability that there 2 red marbles in in urn A after

6. ### Math

A box contains four red marbles, seven white marbles, and five blue marbles. If two marbles are drawn one at a time, find the probability that both marbles are white if the draws are made as follows: (a) With replacement

asked by Star K on May 6, 2010
7. ### math

A bag of marbles contains 8 red marbles and 6 yellow marbles. Two marbles are drawn out of the bag at random without replacement. What is the probability that two red marbles are drawn out? Be sure to represent your answer as a

asked by jasmine on April 22, 2015
8. ### algebra

Four marbles are drawn at random from a bag containing 7 black marbles and 10 red marbles. Determine the number of outcomes in the sample space of this experiment if the marbles are drawn without replacement.

asked by ally on September 28, 2011
9. ### Math

Can someone please explain how to solve this problem? A bag contains 6 blue marbles, 10 red marbles, and 9 green marbles. If two marbles are drawn at random without replacement, what is the probability that two green marbles are

asked by Jacob harry on June 4, 2014
10. ### Math

A bag contains 4 blue marbles and 4 red marbles. If three marbles are drawn in a row without replacement, find the probability that the marbles will be the same colour?

asked by Markus on May 18, 2016

More Similar Questions