Hi,

The Wildlife Federation surveyed 220 San Diego residents. The results are as follows:

32 had a membership to the Birch Aquarium

57 had a membership to the San Diego Zoo

21 had both



i. How many had only a zoo membership? 57-21 = 36

ii. How many had only an aquarium membership? 32-21 = 11

iii. How many belonged to either one or the other or both? 36 + 11 + 21 = 68

iv. How many belonged to neither? 220 - 68 = 152

 

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