P is a set containing n elements. A subset A of P is selected at random. The set P is reconstructed by replacing its elements. A subset B of P is again selected at random. The number of ways of selecting the subsets A and B such `A uu B` is equal to P is

A is a set containing n elements . A subset of A is chosen at random. The set A is reconstructed by replacing the elements of P.A subet Q is again chosen at random. The number of ways of selecting P and Q, is .

A is a set containing n elements . A subet P of A is chosen at random. The set A is reconstructed by replacing the elements of P.A subet Q is again chosen at random. The number of ways of selecting P and Q, is .

A is a set containing n elements. A subset P of A is chosen at random. The set A is reconstructed by replacing the elements of P. A subset Q is again chosen at random. The probability that P =Q, is

A is a set containing n elements. A subset P of A is chosen at random. The set A is reconstructed by replacing the elements of P. A subset Q is again chosen at random. The probability that P =Q, is

S is a set containing n elements. A subset AS of S is selected . The set S is reconstructed by replacing the elements of A.A subset B of S is now selected. If the numer of ways of selecting subsets A and B of S such that AcapB=phi is 81, then n= (A) 3 (B) 4 (C) 5 (D) none of these

A is a set containing n elements. A subset P of A is chosen at random. The set A is reconstructed by replacing the elements of P. A subset Q is again chosen at random. The Probability that P cup Q=A , is

A is a set containing n elements. A subset P of A is chosen at random. The set A is reconstructed by replacing the elements of P. A subset Q is again chosen at random. The Probability that P cup Q=A , is

A is a set containing n elements. A subset P of A is chosen at random. The set A is reconstructed by replacing the elements of P. A subset Q is again chosen at random. The Probability that Q is a subset of P, is