Number of onto and into functions

If A and B are two sets such that 0(A)=5 and 0(B)=6 .Then find the number of one-one and onto function from A to B .(a) 120 (b) 720 (c) 0 (d) None of these

The number of one one onto functions that can be defined from A={a,b,c,d ) into B={1,2,3,~ 4}~

The number of one one onto functions that can be defined from A={a,b,c,d} into B={1,2,3,4} is

Find the number of all onto functions from the set A={1,2,3, ,n} to itself.

Let n(A)=5 and n(B)=3 then find the number of injective functions and onto functions from A to B

Let E={1,2,3,4}andF={1,2}* If N is the number of onto functions from E rarr F then the value of N/2 is

Onto function (Surjective function) and Into functions

One-one,many-one, into and onto function

Total number of onto function from a set of n elements to a set of another r elements.

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