Homework Help: math

Posted by Melissa on Wednesday, November 16, 2011 at 1:24pm.

An urn contains 5 red marbles, 4 blue marbles, and 3 green marbles. A marble is selected at random and then, without replacing the first marble, a second marble is selected at random. What is the probability of selecting a green marble and then a red marble?

math - PsyDAG, Thursday, November 17, 2011 at 1:36pm
Green = 3/12

Red = 5/11, because one green marble has already been picked.

The probability of both/all events occurring if found by multiplying the probabilities of the individual events.

Answer this Question

Related Questions

Math, please check work - A bag contains 7 red marbles, 2 blue marbles, and 1 ...
probability Please check answer - A bag contains 7 red marbles, 2 blue marbles, ...
math - sally has a bag with red,blue, and green marbles. She has twice as many ...
Mathematics - There are 2 white marbles in urn A and 4 red marbles in urn B . At...
math - A bag contains 7 red marbles, 2 blue marbles, and 1 green marble. If a ...
Math - A box contains 3 red marbles, 6 blue marbles, and 1 white marble. The ...
Math - The odds are 3 to 5 in favor of drawing a blue marble in one random ...
math - A bag contains 7 blue marbles, 5 red marbles, and 9 green marbles. A ...
algebra 2 - A bag contains 7 blue marbles, 5 red marbles, and 9 green marbles. A...
pre-algebra - a bag contains 5 green marbles 2 white marbles 8 blue marbles 9 ...

For Further Reading

First Name:
School Subject:
Answer: