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An assembly consists of two mechanical components. Suppose that the probabilities that the first and second components meet specifications are 0.98 and 0.85, respectively. Let

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An assembly consists of two mechanical components. Suppose that the probabilities that the first and second components meet specifications are 0.98 and 0.85, respectively. Let X be the number of components in the assembly that meet specifications. (a) Find the mean of X. (b) Find the variance of X.

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