Question 1107174
The first is (1/2) probability chooses box A and 5/8 probability so 5/16 overall.
The second is (1/2) chooses B, and (6/8) for volleyball so 3/8 probability overall.  
The sum of 5/16 and 3/8 is 11/16 probability overall.
In this instance it is like drawing from a box of both cards, and that would be 11/16 probability of pulling out a volleyball card.