問題詳情
89. Let N1 and N2 represent the numbers of claims submitted to a life insurance company in April and May, respectively. The joint probability function of N1 and N2 is
Calculate the expected number of claims that will be submitted to the company in May, given that exactly 2 claims were submitted in April.
(A)
(B)
(C)
(D)e2 −1
(E)e2
參考答案
答案：E
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中