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Math Help - probability or statistics

  1. #1
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    Exclamation probability or statistics

    I have a problem in math. It is: 6P6 . I don't know what P means! HELP!
    Thanks
    puppylove
    need help ASAP!
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  2. #2
    Len
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    nPr= n!/(n-r)!
    So in your case 6P6=6!/(6-6)!=6!/0!=720/1=720
    In case you are wondering n!=1*2*3*,...n
    6!=6*5*4*3*2*1=720
    0!=1
    These are built in to most calculators.
    Last edited by Len; April 2nd 2008 at 02:17 PM.
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  3. #3
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    Question Len...

    How did you get (6-6)=6! ? I'm so confused!
    puppylove
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  4. #4
    Len
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    Quote Originally Posted by puppylove View Post
    How did you get (6-6)=6! ?
    puppylove
    I didn't, the formula is nPr=\frac{n!}{(n-r)!}

    In your case

    n=6
    r=6

    so 6P6=\frac{6!}{(6-6)!}= \frac{6!}{(0)!}=\frac{720}{1}=720

    I think you missed the division sign & sorry I'm still new to LaTeX.
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