Solve the following problems. Round off your answer to the nearest hundredths. he number of computers sold per day at a local computer store, along with the corresponding probabilities is shown in the table. Find the mean, variance and standard deviation. Number of Cellphones Sold X Probability P(X) 0.1 1 0.2 0.3 3 0.2 4 0.2 ININIACULAT

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