問題詳情

77. The profit for a new product is given by Z = 3X – Y – 5. X and Y are independent random variables with Var(X) = 1 and Var(Y) = 2.
Calculate Var(Z).
(A) 1
(B) 5
(C) 7
(D) 11
(E) 16

參考答案

答案:D

統計:A:0,B:0,C:0,D:0,E:0

難度:計算中