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Math Help - Tricky Probability Question

  1. #1
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    Tricky Probability Question

    Two screws are missing from a machine that has screws of three different sizes. If three screws of different sizes are sent over, what is the probability that they are whats needed.

    I am having a tough time with this problem. Can someone shed some light on how to go about this. Thanks.
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  2. #2
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    Quote Originally Posted by multivariablecalc View Post
    Two screws are missing from a machine that has screws of three different sizes. If three screws of different sizes are sent over, what is the probability that they are whats needed.

    I am having a tough time with this problem. Can someone shed some light on how to go about this. Thanks.
    You need to calculate the probability that the missing screws are NOT both the same size.
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