For finite sets, $n(A\times B)$ equals:
A$n(A)+n(B)$
B$2^{n(A)+n(B)}$
C$n(A)\cdot n(B)$
D$n(A)^{n(B)}$
Answer & Solution
Correct answer: C. $n(A)\cdot n(B)$
By definition, for finite sets n(A×B) = n(A)·n(B).
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