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The independent random variables X and Y are defined by the following probability distribution tables: X...

The independent random variables X and Y are defined by the following probability distribution tables: X 1 3 6 f(x) 0.6 0.3 0.1 Y 2 3 5 7 f(y) 0.1 0.2 0.3 0.4Determine the standard deviation of 3Y + 5

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