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Homework Help: Probability Theory.

  1. Sep 25, 2005 #1
    Hello, I have two questions regarding probaility, i was hoping some body can help me out.
    I know that this is a "Physics Forum" However, i thought somebody might still beable to help :)


    When rolling 5 distinuishable dice, find the probability that there are two different values?

    I did this by (6 x 5 x 4)/2 x ( 5 ) = 1800
    (2 2 1)

    and the probability is 1800/(6^5) = 0.23148

    Now, I am wondering WHY do you devide the (6 x 5 x 4) by 2?

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  2. jcsd
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