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Question: An independent roofing contractor has determined that the number of jobs obtained for the month of September varies. From previous experience, the probabilities of obtaining 0, 1, 2, or 3 jobs have been determined to be 0.1, 0.35, 0.30, and0.25, respectively. The profit obtained from each job is $300. What is the expected profit and the standard deviation of profit for September?

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