How many functions, onto, and one-to-ones?

Please help. I have been working on the following problem:


How many functions are there from http://brevardcc.angellearning.com/A...008_003780.gif, a set with two elements, to http://brevardcc.angellearning.com/A...024_884456.gif, a set with three elements?


How many of these functions are one-to-one?


How many are onto?

I get 9 functions, 6 one-to-one and 0 onto. Is this right?


(Rock)

Quote:

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Originally Posted by brianjasperman

Please help. I have been working on the following problem:


How many functions are there from http://brevardcc.angellearning.com/A...008_003780.gif, a set with two elements, to http://brevardcc.angellearning.com/A...024_884456.gif, a set with three elements?
How many of these functions are one-to-one?
How many are onto?

I get 9 functions, 6 one-to-one and 0 onto. Is this right?

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Each of those answers is correct.