Let `S={1,2,3, . . .,n}`. If X denotes the set of all subsets of S containing exactly two elements, then the value of `sum_(A in X) ` (min. A) is given by

Let A = { 1, 2, 3, …….n } , if a_(i) is the minimum element of the set A_(i) , (where A_(i) , denotes the subset of A containing exactly two elements) and X denotes the set of A_(i) 's , then evalute sum_(A_(i)inX) a

The number of all subsets of a set containing 2n+1 elements which contains more than n elements is

The number of all subsets of a set containing 2n+1 elements which contains more than n elements is

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 .

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 .

A set contains 2n+1 elements. The number of subsets of this set containing more than n elements :

A set contains 2n+1 elements. The number of subsets of this set containing more than n elements :

A set contains 2n+1 elements. The number of subsets of this set containing more than n elements :