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true or false please quickly thanks !!! 5 If X is a random variable, a and b are two scalars, then Var(aX+b)=a Var(X). 6 If

true or false please quickly thanks !!!
5
If X is a random variable, a and b are two scalars, then Var(aX+b)=a Var(X).
6
If X is a random variable, a and b are two scalars, then E(aX+b)=a E(X)+b.
7
Suppose a random variable X has o.d.f. F(x), then the probability that X lies in the interval (a, b] is F(b)F(a)

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