1.

If x and y are two sets such that n(x) = 17, n(y) = 23 and n(x ∪ y) = 35, find n(x ∩ y)

Answer»

n(X ∩ Y) = n(X) + n(Y) – n(X ∪ Y) = 17 + 23 – 38 = 2.



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