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14-12-2022
Mathematics

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At a large university, data were collected on the number of sisters and brothers that each student had. Let the random variable x represent the number of sisters and the random variable y represent the number of brothers. The distribution of x has mean 1. 00 and standard deviation 0. 94. The distribution of y has mean 1. 07 and standard deviation 1. 4. What is the mean of the distribution of x+y ?.

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