Question

If A and B are sets having three elements each then what is the number
of elements in P(A) x P(B)?​

Answer 1

Step-by-step explanation:

Given, n(A)=4,n(B)=2

∴n(A×B)=8

Thus the number of subsets of A×B having at least 3 elements

=28−8C0−8C1−8C2=256−1−8−28=219