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

  1. #1
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    How many functions, onto, and one-to-ones?

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


    How many functions are there from , a set with two elements, to , 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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  2. #2
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    Re: How many functions, onto, and one-to-ones?

    Quote Originally Posted by brianjasperman View Post
    Please help. I have been working on the following problem:


    How many functions are there from , a set with two elements, to , 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?
    Each of those answers is correct.
    Thanks from brianjasperman
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