1.

If x and y are the sets such that n(x) = 17, n(y) = 23 & n(X ∪ Y) = 38. Find n(X ∩ Y)

Answer»

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



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