1. Demand for a product of Washington Industries varies greatly from month to month. The probability distribution is given in the table below. Unit demand Probability 200 0.25 400 0.35 500 0.3 800 0.1 a. Determine the mean and standard deviation for the monthly demand. b. Determine the probability that the monthly demand in each of the two upcoming months exceeds 400 units. You may assume that the demand in any month is independent of demand in other months.
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To calculate the mean, we need to find the total number of units sold in each month and divide it by the number of months in the year. Show more…
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