Let `A={1,2,..., n}` and `B={a , b` }. Then number of surjections from `A` into `B` is nP2 (b) `2^n-2` (c) `2^n-1` (d) nC2

Let A={1,2,..., n} and B={a , b }. Then number of subjections from A into B is

Let A = {1, 2, 3, …..., n} and B = {a, b}. Then the number of surjection from A into B is

Let A = {1, 2, 3, ..., n} and B= {a,b}. Then the number of surjections from A into B is

Let A={1,2,..., n} and B={a , b }. Then number of subjections from A into B is n_P_2 (b) 2^n-2 (c) 2^n-1 (d) nC2

Let A={1,\ 2,\ ,\ n} and B={a ,\ b} . Then the number of subjections from A into B is \ ^n P_2 (b) 2^n-2 (c) 2^n-1 (d) \ ^n C_2

Let A = {1,2,3,…,n} and B = {x,y}. Then the number of surjections from B into A is

If A={1,2,3,.....n],nge2 and B={a,b} , then the number of surjections from A to B is