Let random variable X be distributed according to the p.m.f P(a) 0.3 0.5 0.2 · If…

Let random variable X be distributed according to the p.m.f P(a) 0.3 0.5 0.2 · If Y = 2x, what are ELY Var(Y) If Z = aX + b has E121 = 0 and Var(Z) = 1, what are: .