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Expected Value and Variance: The random variable D takes on the values: 3, 5, 6 with probabilities: 0.3, 0.3, 0.4 . What is the expected

Expected Value and Variance: The random variable D takes on the values: 3, 5, 6 with probabilities: 0.3, 0.3, 0.4 . What is the expected value, variance, and standard deviation of D. (if you use Excel you should also provide detailed calculations for all 3 on paper as well, following their formulas).

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