Question: An electronics store sells a particular model of a laptop computer. There are only 4 laptops in stock and the manager wonders what today's demand

An electronics store sells a particular model of a laptop computer. There are only 4 laptops in stock and the manager wonders what today's demand for this model will be. She learns from the marketing department that the probability distribution for X, the daily demand for the laptop, is as shown in table below. Find the mean and standard deviation of the daily demand for laptop. Show each step.

X 0 1 2 3 4 5

P(X) 0.1 0.4 0.2 0.15 0.10 0.05

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