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5 X ha, pdf f ( x ) = 3x2 0exs | and f (x) = 0 0.w. Find E ( V X ) =

5 X ha, pdf f ( x ) = 3x2 0exs | and f (x) = 0 0.w. Find E ( V X ) = ? and Var ( VX) =? 6 X and Y are independent riv.'s with E ( X ) = 2, E ( Y )=1 Var ( X) = 4 and Var ( Y) = 9. Let 7-3x-27+4 Find E ( Z) = ? and Var ( 2 ) =

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