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This is in Statistics all about Random Variable.. Provide clean and clear complete solutions. Minimize erasures and provide a clear picture of the solutions thank

This is in Statistics all about Random Variable.. Provide clean and clear complete solutions. Minimize erasures and provide a clear picture of the solutions thank you and Godbless.
15. Consider the random variable X" with probability distribution given by /(x) = x +x for x = 1, 2, 3. 20 Calculate the mean and standard deviation

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