题目

英语翻译
An internal study by the technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour.Assume the arrical of these emails is approximated by the Poisson distribution.
a.What is the probability Linda Lahey,company president,received exactly 1 email between 4 P.M.and 5 P.M.yesterday?
b.What is the probability she received 5 or more emails during the same period?
c.What is the probability she did not receive any emails during the period?

提问时间：2020-08-09

答案

雷希电子技术服务部的内部研究透露公司员工平均每小时会收到2封电子邮件.
假设这些邮件用泊松分布进行估计
A 求出琳达·雷希,公司总裁,正好在昨天下午4点到5点之间接到一封邮件的概率
B 她在同一时间收到5封或者超过5封邮件的概率是多少?
C.她在这段时间没有收到邮件的概率是多少?
纯手打,