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Math Help - Probability of winning lottery

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    Probability of winning lottery

    A player selects 7 numbers out of the first 80 positive integers. What is the probability a perons wins the grand prize by picking 7 numbers that are among the 11 numbers selected at random by a computer?
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    Quote Originally Posted by mapleleafs89 View Post
    A player selects 7 numbers out of the first 80 positive integers. What is the probability a persons wins the grand prize by picking 7 numbers that are among the 11 numbers selected at random by a computer?
    This amounts to asking “how many ways can my selection of seven integers from eighty matches the eleven chosen at random”.
    \frac{\displaystyle \binom{73}{4}}{\displaystyle\binom{80}{11}}
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