Question

If the number of subsets of set A are 120 more than the subsets of B, then the number of elements of set A and B respectively​

Answer 1

Step-by-step explanation:

Given n(A) =4,n(B) =2

n(A×B)= 8

Thus the no.of subsets of A×B having at least 3 elements

=2⁸-⁸C⁰- ⁸C¹-⁸C²=256-1-8-28 = 219