Q. 75.0( 1 Vote )

Let A and B be tw

Answer :

Here, n(A)=4 and n(B)=7


Now, n(AB) =n(A)+n(B)-n(AB)


=4+7-n(AB)


=11-n(AB)


So, n(AB) is maximum whenever n(AB) is minimum and it is possible only when AB=ϕ


Now, AB=ϕ then min(n(AB)) =0.


min(n(AB))=11-0=11


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