Let X be a set containing n elements. Two subsets A and B of X are chosen at random, the probability that `AuuB=X` is

Let X be a set containing n elements.If two subsets A and B of X are picked at random,the probability that A and B have the same number of elements is

Let X be a set containing n elements. If two subsets A and B of X are picked at random, the probability that A and B have the same number of elements is

Let X be a set containing n elements. If two subsets A and B of X are picked at random, the probability that A and B have the same number of elements is

Let X be a set containing n elements. If two subsets A and B of X are picked at random, the probability that A and B have the same number of elements is

.Let X be a set containing n elements. If two subsets A and B of X are picked at random, the probability that A and B have the same number of elements is

Let X be a set containing 3 elements. If two subsets A and B of X are picked at random, the probability that A and B have the same number of elements is k then 1/k is______.

Let X be a set containing 3 elements. If two subsets A and B of X are picked at random, the probability that A and B have the same number of elements is k then 1/k is______.

Suppose A is a set containing n elements. Two subsets P and Q of A are chosen at random. If the probability that P is a subset of Q is 243/1024, then n is equal to