B={ } , then n [B] =
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0 or infinity is the answer of the question
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A
48
Cartesian product of two sets is obtained by pairing each element of first set with each element of second set.
Given : n(A)=m and n(B)=n
Now, n(A×B)=n(A)×n(B)=m×n=mn.
Thus when m=8 and n=6, we have n(A×B)=48
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