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1)Suppose that Var(X) =5. Which one of the following two calculations is correct? Explain. a.Var(2X) = Var (X+X) = Var(X)+ Var(X) = 2 Var(X)= 10

1)Suppose that Var(X) =5. Which one of the following two calculations is correct? Explain.

a.Var(2X) = Var (X+X) = Var(X)+ Var(X) = 2 Var(X)= 10

b.Var(2X) = 4 Var (X) = 20

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