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Math Help - SIMPLE PROBABILITY Q

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    SIMPLE PROBABILITY Q

    The sides of a fair six-sided dice are numbered from 1 to 6
    The dice is thrown three times
    Find the probabilitty that it shows a 1 at least twice.
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    Quote Originally Posted by abey_27 View Post
    The sides of a fair six-sided dice are numbered from 1 to 6
    The dice is thrown three times
    Find the probabilitty that it shows a 1 at least twice.
    This is a binomial distribution.

    P(X \geq 2) = \sum_{n = 2}^{3} {3 \choose n} \left( \frac{1}{6} \right) ^{n} \left( \frac{1}{6} \right) ^{3 - n}
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