Question

Let A = {1, 2, 3, ...n} and B = {a, b}. Then the number of surjections from A into B is
(A) nP2

(B) 2n – 2

(C) 2n – 1

(D) None of these​

Answer 1

Answer:

option (D) none of these

the number of surjection from A to B is none of these