Exam P：Probability機率題庫下載題庫

299. An insurance company categorizes its policyholders into three mutually exclusive groups. A study produced the following information:

 Within each group, the numbers of claims made by individual policyholders are mutually independent Poisson random variables.

Calculate the expected total number of claims, in thousands, made by the 100,000 policyholders.
(A) 21
(B) 28
(C) 36
(D) 64
(E) 72