Question: Sample problem: The daily demand for magazine copies at a variety store is 0, 1, 2, and 3, with probabilities of 0.4, 0.3, 0.2, and

Sample problem:

The daily demand for magazine copies at a variety store is 0, 1, 2, and 3, with probabilities of 0.4, 0.3, 0.2, and 01, respectively. Calculate the given's mean and variance. Please provide a detailed explanation. * By the way, I got 1 for both the mean and the variance, though I'm not sure if my answer is correct or if I followed the steps correctly.

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