Number of Subsets | Let's Crack IIT JAM | Satyendra Kumar #shorts

Let A and B be too sets containing four and two elements respectively then the number of subsets of set A xx B having atleast 3 elements is

Let "A" and "B" be two finite sets with "m" and "n" elements respectively.The total number of subsets of the set "A" is "56" more than the total number of subsets of "B" .Then the distance of the point "P(m,n)], from the point "Q(-2,-3)" is :

The number of proper subsets of { 1, 2, 3} is