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1. For discrete random variable X, if E(X) =3, what is the value of E(2X+5)? A. 11 B. 12 C. 6 D. 17 2. X

1. For discrete random variable X, if E(X) =3, what is the value of E(2X+5)?

A. 11

B. 12

C. 6

D. 17

2. X is a binomial random variable such that X ~ Bin (12, 0.3)

What is the variance of X,Var(X)?

A. 2.52

B. 3.60

C. 1.59

D.8.40

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