Question: Suppose that the random variable X takes the values -2, 1, 4, and 6 with probability values I /3, 1 /6, 1 /3, and 1

Suppose that the random variable X takes the values -2, 1, 4, and 6 with probability values I /3, 1 /6, 1 /3, and 1 /6, respectively.
(a) Find the expectation of X.
(b) Find the variance of V using the formula
Var(X) = E((X - E(X))2)
Find the variance of X using the formula
Var(X) = E(X2) - (E(X))2

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