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Ifn(U)=50,n(A...

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Ifn(U)=50,n(A)=20,n((AUB)')=18 then n(B-A)is

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Q. If n (A) = 20, n (B) = 28 and n (A

\cup

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Q. If n(U) = 50, n(A) = 20,

n ((A \cup B)^{'})

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n (A \cap B) = 10

n (A △ B)

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