問題詳情

3. IfX1,X2, .... Xn are mutually independent normal random variables, with their means all equal to 3 and variancesequal to 10, what is the variance of Y =

?
(A)400
(B) 200
(C) 400n
(D) 200n
(E) None of the above choices (a)-(d).

參考答案

答案:[無官方正解]
難度:計算中-1
書單:沒有書單,新增