A Survey Of 160 Families Showed That 59 Had A Dog; 46 Had A Cat; 19 Had A Dog And A Cat; 63 Had Neither A Cat Nor A Dog, And In Addition Did Not Have A Parakeet; 3 Had A Cat, A Dog, And A Parakeet. How Many Had A Parakeet Only?


Answer:
ZERO had a parakeet

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