(3) If n (A)= 15, n (AUB)-29, n(An B)-7, then n(B)? – InterviewSolution

1.	(3) If n (A)= 15, n (AUB)-29, n(An B)-7, then n(B)?
Answer» n(A U B) = n(A) + n(B) - n(A ∩ B)n(B) = n(A U B) + n(A ∩ B) - n(A) = 29 + 7 - 15 = 21

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