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Math Help - Probability of 3-digit combination correct if no digits can be repeated.

  1. #1
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    Probability of 3-digit combination correct if no digits can be repeated.

    Hey math folks!
    Here is a question for you:

    What is the probability that you will get a 3-digit combination correct if no digits in the combination can be repeated?

    Please show me how to solve it....

    Thanks in advance
    Last edited by mr fantastic; June 30th 2011 at 01:34 PM. Reason: Re-titled.
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  2. #2
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    Re: Probability

    Quote Originally Posted by IBstudent View Post
    What is the probability that you will get a 3-digit combination correct if no digits in the combination can be repeated?
    Well there are (10)(9)(8)=720 possible combinations.
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  3. #3
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    Re: Probability

    Quote Originally Posted by Plato View Post
    Well there are (10)(9)(8)=720 possible combinations.
    That is correct, may I ask how you got these numbers?
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  4. #4
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    Re: Probability

    Okay nevermind guys I think I found out how.....
    Thanks.
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