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Question Description

I’m working on a Probability multi-part question and need an explanation to help me study.

6. Suppose some random variable X can take on any value from the set {2, 4, 6, 8, 10} with the

following probability distribution:

P(X = 2) = 0.15, P(X = 4) = 0.2, P(X = 6) = 0.1, P(X = 8) = 0.35, P(X = 10) = 0.2

Find the expected value, the variance and standard deviation for X.