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Mathematics, 18.04.2020 05:45 KiwiJelly2587

The distribution of random variable R has mean 10 and standard deviation 4. The distribution of random variable S has mean 7 and standard deviation 3. If R and S are independent, what are the mean and standard deviation of the distribution of R−S ? Mean 3 and standard deviation 1

A. Mean 3 and standard deviation 5

B. Mean 3 and standard deviation 7

C. Mean 17 and standard deviation 1

D. Mean 17 and standard deviation 5

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