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## Homework Statement

I have 2 sets, one with 5 elements (A) and the other two(B).

How many onto functions can be made from A to B?

## Homework Equations

## The Attempt at a Solution

My first thought is that it should be something like ##\frac{5!}{2!}=60##. I don't know if this is correct or not, I began counting them up manually but quickly found that it was not really feasible to do without mistakes. I've never been very good at these combinations problems and I can't say I ever really understand them.

Thanks for the help.