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A factory produces an item. There is some randomness in the process. A successful final product must be within -2 and 1 standard deviations. A

A factory produces an item. There is some randomness in the process. A successful final product must be within -2 and 1 standard deviations. A normal distribution is assumed. Out of 3 items, what is quick estimation of the probability that more than 1 of them is successful

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