Question

If A and B are two sets such that n(AUB) = 50, n(A) = 28 and n(B) = 32, find n(AintersectionB).

Answer 1

soln: n(AUB)= n(A)+n(B)-n(AintersectionB).
n(AintersectionB)=n(A)+n(B)-n(AUB).

n(AintersectionB) = 28+32-50= 10

n(AintersectionB)= 10

Answer 2

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