The number of Surjections from A = {1, 2, ....4}, `n ge 2`, onto B = {a, b} is

The number of surjections from A = {1,2,,.....n}, n ge 2 onto B = {a,b} is

The number of surjections that can be defined from {1, 2, 3, 4, 5} onto {a, b} is

The number of surjections that can be defined from {1, 2, 3, 4, 5} onto {a, b, c} is

The number of surjections that can be defined from A={1,2,3,.......n} to B={a,b} is 30 then the value of n is A)4 B)5 C)6 D)7

Find the number of surjections from A to B, where A={1,2,3,4}, B={a,b}.

Find the number of surjections from A to B, where A={1,2,3,4}, B={a,b}.