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

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

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 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 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 n_P_2 (b) 2^n-2 (c) 2^n-1 (d) nC2

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

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

If A= {1,2,3...,n} and B ={ a,b} Then , the number of subjection 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