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August 3, 2015

Homework Help: Finite

Posted by Athena on Tuesday, November 15, 2011 at 4:14pm.

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 that the
second was red?

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