if A and B are two sets having 3 elements in common . if n(A) =5,n(B)=4, find n(A*B) and n[(A*B) intersection (B*A)]
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if A and B are two sets having 3 elements in common . if n(A) =5,n(B)=4, find n(A*B) and n[(A*B) intersection (B*A)]
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