Question: Suppose x and y are two random variables. If y= 3x -2 then the mathematical expectationsand variances of x and y are related as follows

Suppose x and y are two random variables. If y= 3x -2 then the mathematical expectationsand variances of x and y are related as follows

a) E(y)=3E(x)-2, V(y)=9V(x)-2

b) E(y)=3E(x), V(y)=9V(x)

c) E(y)=3E(x)+2, V(y)=9V(x)+2

d) E(y)=3E(x)-2, V(y)=9V(x)

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