Question

If A and B are two sets such that n(A) = 54, n(B) = 39 and n(B - A) = 13 then find n(A B).​

Answer 1

Step-by-step explanation:

n(A) = 54

n(B) = 39

n(B - A) = 13

n(AnB) = n(B) - n(B-A)

= 39 - 13

= 26

n(AuB) = n(A) + n(B) - n(AnB)

= 54 + 39 - 26

= 67

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