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Math Help - 3 dice and probability. this one is pretty weird.

  1. #1
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    3 dice and probability. this one is pretty weird.

    I think I have it figured out but I am not sure. Its a multiple choice question so there are 5 possible answers.

    "Three fair dice are tossed. Find the probability that exactly 2 of the 3 tosses result in a 6>'

    A - 125/216
    B - 15/216
    C - 1/216
    D - 75/216
    E - None of the above

    Now I am not sure but i worked the problem and got about 5/216 making the answer D. But I am kind of iffy on it. Any input our help would be great. Thanks alot!
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  2. #2
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    Quote Originally Posted by IWasJustinYou View Post
    I think I have it figured out but I am not sure. Its a multiple choice question so there are 5 possible answers.

    "Three fair dice are tossed. Find the probability that exactly 2 of the 3 tosses result in a 6>'

    A - 125/216
    B - 15/216
    C - 1/216
    D - 75/216
    E - None of the above

    Now I am not sure but i worked the problem and got about 5/216 making the answer D. But I am kind of iffy on it. Any input our help would be great. Thanks alot!
    This is "binomial probability".
    The probability of succes is 1/6
    The probability of fail is 5/6
    Thus,
    { 3\choose 2}(1/6)^2(5/6)^1
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  3. #3
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    thanks alot for your help.
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