statistics

Data shows that 93% of the people in a certain population are right-handed. A group of 9 people from this population are selected at random. What is the probability that exactly 7 of the people in the group are right-handed?
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  1. prob of right-handed = .93
    prob of NOT right-handed = .07

    prob (7 of 9 are right-handed)
    = C(9,7)(.93)^7(.07)^2
    = appr. 0.10614

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