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Math Help - Probability of selling cars

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    Probability of selling cars

    A new car salesperson knows that he sells cars to one customer out of 20 who enter the showroom. The probability that he will sell a car to exactly two of the next three customers is?
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    Quote Originally Posted by jax760 View Post
    A new car salesperson knows that he sells cars to one customer out of 20 who enter the showroom. The probability that he will sell a car to exactly two of the next three customers is?
    Use binomial with n = 3 and p = 1/20 to calculate Pr(X = 3).
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