問題詳情
29. An actuary has discovered that policyholders are three times as likely to file two claims as to file four claims.
The number of claims filed has a Poisson distribution.
Calculate the variance of the number of claims filed.
(A)
(B) 1
(C)
(D) 2
(E) 4
參考答案
答案：D
統計：A:0,B:0,C:0,D:1,E:0
難度：計算中