Suppose the following two boxes are given,
Box A contains 3 red and 2 white marbles
Box B contains 2 red and 5 white marbles.
A box is selected at random; and a marble is drawn from it and put into the other box; then a marble is drawn from the second box. Find the probability that both marbles drawn are of the same color.
Hint: construct the stochastic tree diagram. Note that this is a three-step process: choosing a box, choosing a marble and choosing a second marble.

Question

Suppose the following two boxes are given, 
	Box A contains 3 red and 2 white marbles
	Box B contains 2 red and 5 white marbles.
A  box is selected at random; and a marble is drawn from it and put into the other box; then a marble is drawn from the second box. Find the probability that both marbles drawn are of the same color.
Hint: construct the stochastic tree diagram. Note that this is a three-step process: choosing a box, choosing a marble and choosing a second marble.