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6. The probabilities that a production process will produce 0, 1, 2, 3, 4 or 5 units in one hour are 0.05, 0.16, 0.21, 0.34,

6. The probabilities that a production process will produce 0, 1, 2, 3, 4 or 5 units in one hour are 0.05, 0.16, 0.21, 0.34, 0.22 and 0.02 respectively. Find the mean and the variance of this probability distribution

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