問題詳情
229. A government employee’s yearly dental expense follows a uniform distribution on the
interval from 200 to 1200. The government’s primary dental plan reimburses an
employee for up to 400 of dental expense incurred in a year, while a supplemental plan
pays up to 500 of any remaining dental expense.
Let Y represent the yearly benefit paid by the supplemental plan to a government
employee.
Calculate Var(Y).
(A) 20,833
(B) 26,042
(C) 41,042
(D) 53,333
(E) 83,333
參考答案
答案：C
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中