Question: The distribution for the random variable G has a mean of 12 and a standard deviation of 5. The distribution of the random variable S

The distribution for the random variable G has a mean of 12 and a standard deviation of 5. The

distribution of the random variable S has a mean of 9 and a standard deviation of 4. If G and S are

independent, what are the mean and standard deviation of G-S.

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