Consider set `A {a,b,c,d,e}` & set `B{q,r,s}`.Function f is defined from A to B.Find number of onto functions from A to B such that `f(a) =q` is?

Consider set A = {x_(1), x_(2), x_(3), x_(4), x_(5)} and set B = {y_(1), y_(2), y_(3)} . Function f is defined from A to B. Number of function from A to B such that f(x_(1)) = y_(1) and f(x_(2)) != y_(2) is

Consider set A = {x_(1), x_(2), x_(3), x_(4), x_(5)} and set B = {y_(1), y_(2), y_(3)} . Function f is defined from A to B. Number of function from A to B such that f(x_(1)) = y_(1) and f(x_(2)) != y_(2) is

Consider set A = {x_(1), x_(2), x_(3), x_(4), x_(5)} and set B = {y_(1), y_(2), y_(3)} . Function f is defined from A to B. Number of function from A to B such that f(x_(1)) = y_(1) and f(x_(2)) != y_(2) is

If A and B are two sets with n(A)=4 and n(B)=2 then the number of onto functions from A to B is

If A and B are two sets with n(A)=4 and n(B)=2 then the number of onto functions from A to B is

Set A contains 3 elements and set R contains 2 elements. The number of onto functions from A onto B is

Let A={1,\ 2,\ 3,\ 4} and B={a ,\ b} be two sets. Write total number of onto functions from A to B .

Let A={1,\ 2,\ 3,\ 4} and B={a ,\ b} be two sets. Write total number of onto functions from A to B .