A random variable X can take on three possible values: 0, 8, or 20. Each of these values is associated with the following

Question

A random variable X can take on three possible values: 0, 8, or 20. Each of these values is associated with the following probabilities:
P(X= 0) = 0.25, P (X= 8) = 0.25, and
P(X= 20) = 0.5.
What is the expected value of X?

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