(3) If n(A) 15, n(AU B) 29, n(AnB) 7, then n(B)? – InterviewSolution

1.	(3) If n(A) 15, n(AU B) 29, n(AnB) 7, then n(B)?
Answer» We know, n(A U B) = n( A) + n(B) - n(A ∩ B)So,29 = 15 + n(B) - 29n(B) = 29 + 14n(B) = 43

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