Question

If A = {1,2,3,4}; B = {3,4,5,6 Find the number of subsets of A if n(A) = 4​

Answer 1

Answer:

Given, A={1,2} and B={3,4}.

Now,

A×B={(1,3),(1,4),(2,3),(2,4)}.

Since A×B contains 4 elements, so number of subsets of A×B is 2

4

=16.