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Math Help - formula for possible options

  1. #1
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    formula for possible options

    Isn't there a formula that will tell me the number of possible 3 course selections out of a population of 5 courses? Seems like writing down all the different options and then counting them is a waste of time, but I haven't been able to find the formula.
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  2. #2
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    Re: formula for possible options

    You are probably talking about combinations.
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  3. #3
    Member Goku's Avatar
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    Re: formula for possible options

    n choose k = \frac{n!}{k!(n-k)!}
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  4. #4
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    Re: formula for possible options

    thank you!
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