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Question

If n(A - B) = 36, n(B - A) = 40 and n (AB)=24, then n (AB)= ___

A
100
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B
64
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C
60
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D
76
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Solution

The correct option is A 100

n(AB)=36

n(AB)=24

n(BA)=40

n(AB)=n(AB)+n(AB)+n(BA)

=36+24+40

=100


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