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Math Help - Probability using binomial distribution

  1. #1
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    Probability using binomial distribution

    I was hoping someone might check my work as the answer seems a little off:

    A die is thrown 20 times and a success id defined as a one or a six on the upface of the die.

    Use the binomial distribution to determine the probability of getting exactly five successes in the 20 trials.

    I came up with:

    C(20,5)*((2/6)^5)*((4/6)^15)

    =0.1462

    Any help would be appreciated.
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  2. #2
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    Quote Originally Posted by jake.davis View Post
    A die is thrown 20 times and a success id defined as a one or a six on the upface of the die.
    Use the binomial distribution to determine the probability of getting exactly five successes in the 20 trials.
    C(20,5)*((2/6)^5)*((4/6)^15)
    Correct
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