A class of 40 students completed a survey on what pets they like. The choices were: Cats, Dogs, and Birds. Everyone liked at least one pet. 10 students liked Cats and Birds but not dogs 6 students liked Cats and Dogs but not birds 2 students liked Dogs and Birds but not Cats 2 students liked all three pets 10 students liked Cats only 9 students liked Dogs only 1 student liked Birds only How many students liked: a. Cats? b. Birds? c. Dogs?

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