寫作批改
VIP與詳解卡管理
私人筆記( 0 )
142. The lifespan, in years, of a certai..-阿摩線上測驗
【客服暫停服務時間】10/31(四)，影響：阿摩粉絲團、系統回報、信箱、鑽石兌換商城出貨事宜。
|
|
|
142. The lifespan, in years, of a certain computer is exponentially distributed. The probability
that its lifespan exceeds four years is 0.30.
Let f(x) represent the density function of the computer’s lifespan, in years, for x ＞ 0.
Determine which of the following is an expression for f(x).
(A) 
(B) 
(C) 
(D) 
(E) 