A find ex b find e x2 c find varx d find the expected value
Let X be a discrete random variable with the following distribution.
X X=0, X=1, X=2
f(x) 0.25, 0.5, 0.25
(a) Find E(X)
(b) Find E X2
(c) Find Var(X)
(d) Find the expected value and variance of Y, where Y = 3X + 2
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