Q13 of 71 Page 32

If n(X) = m, n(Y) = n and n(X ∩ Y) = p then n(X ∪ Y) =

Given


n(X) = m, n(Y) = n and n(X ∩ Y) = p


n(X ∪ Y) = ?


we know that n(A ∪ B) = n(A) + n(B) - n(A ∩ B)


in the same way, n(X ∪ Y) = n(X) + n(Y) - n(X ∩ Y)


n(X ∪ Y) = m + n – p


∴ option B is the correct answer.

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