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051 A random variable X has the following probably distribution: X 2 3 5 P(x) 0.15 0.35 0. 10 0.20 0.20 5. Find E(x2) Q 7.65 0 8,65 0 9.65 O 10.65 Q61 A random variable .X has the following probability distribution: X 2 13 4 5 P(x) 0.15 0.35 0.20 0.20 6. Find Var(X). 1,9475 0 2.9475 0 3.9475 4.9475 071 A random variable Y has the following probability distribution: 2 3 4 5 P(x) 0.15 0.35 0.10 0.20 0.20 7. Find the standard deviation of .X 0.396 1.396 2 396 3.398