Let A and B be two sets such that n(A)=20,n(A∪B)=42 and n(A∩B)=5. – InterviewSolution

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1.	Let A and B be two sets such that n(A)=20,n(A∪B)=42 and n(A∩B)=5. Then, n(B−A)=
Answer» $Let A and B be two sets such that n (A) = 20, n (A \cup B) = 42 and n (A \cap B) = 5 . Then, n (B - A) =$

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