Question

If A and B are two sets such that n(A) = 4, n (B) = 5 and n (AnB)=3. Find n (neither A not B).​

Answer 1

n (AUB) = n (A) + n (B) - n (AnB)

n (AUB) = 4 + 5 - 3

n (AUB) = 9 - 3

n (AUB) = 6

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