Answer: 5/12
Step-by-step explanation:
Box A: 2 Red
1 Black
Box B: 1 Red
2 Black
One card is selected from Box A and placing the selected card into Box B.
One card is selected from Box B.
What is the probability that a red card is selected from Box B?
Two things can occur:
1) Select red from A and B:
2/3 * 2/4 = 1/3
2) Select black from A and red from B:
1/3 * 1/4 = 1/12
As 1) or 2) can occur:
1/3 + 1/12 = 5/12
