Let set ` A = { 1, 2, 3, ….., 22} ` . Set B is a subset of A and B has exactly 11 elements, find the sum of elements of all possible subsets B .

If a set A has 12 elements, find the number of subsets of A having 4 elements

A set A has 10 elements. Find the number of subsets of A with atmost 4 elements.

If a set has n elements then the total number of subsets of A is

A set has n elements, then the total number of subsets of A is

A set has 4 elements,then total number of subsets is:

IF a set A has 12 elements , then the number of subsets of A having atleast 3 elements is

A subset A of the set X={1,2,3,..,100} is chosen at random. The set X is reconstructed by replacing the elements of A, and another subset B of X is chosen at random. The probability that A cap B contains exactly 10 elements, is