Question 498050
11 notB (18 - 7), but 3 are neither, so 8 are notB but H


5 notH (18 - 13), but 3 are neither, so 2 are notH but B


8 only H, 2 only B, 3 neither ___ leaving 5 for both (18 - 8 - 2 - 3)