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Unformatted text preview: day. If there are 20 customers in a given day, and if this represents a random sample of all of the motels customers, a. Find P(X=0) b. Find P(X>18) c. Find mean and variance of the amount of discount paid by the firm. 4. It is known that 40 % of Allegheny students come from large metropolitan areas. a. If we choose 10 students at random, what is the probability that 3 of them are from large cities? b. On the average in a sample of 10, how many students are expected to come from large cities? c. What is the variance and how do you interpret this number?...
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 Spring '08
 Martin
 Economics

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