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    Probability of a randomly selected hour of calls

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    A car towing company averages 3 calls per hour. What is the probability that in a randomly selected hour the number of calls is 2?

    The random variable X represents the annual salaries in dollars of a group of teachers. Find the expected value E(X).
    X = {$30,000; $40,000; $50,000}.
    P(30,000) = .5; P(40,000) = .3; P(50,000) = .2

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    Solution Preview

    A car towing company averages 3 calls per hour. What is the probability that in a randomly selected hour the number of calls is 2?

    Solution. Let X be ...

    Solution Summary

    This solution finds a probability given an average per hour

    $2.19

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