Joint Probability Distributions

E(X+Y)=

E(X-Y)=

E(aX+bY) =

If X & Y are independent

E(XY)=

E(X^2Y)=

E(X/Y)=

Var(X+Y)=

Var(X-Y)=

Var(XY)=

Var(aX±bY)=