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If A and B are two sets such that n(A) = 115, n(B) = 326, n (A − B) = 47, then write {A⋃B). |
Answer» Here, n(A) =115 , n(B) = 326 , n(A∖B) = 47 n(A∖B) = n(A) - n(A⋂B) ∴ n(A⋂B) = n(A) - n(A∖B) = 115 - 47 = 68 Now, n(A⋃B) = n(A) + n(B) - n(A⋂B) = 115 + 326 - 68 = 373 |
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