作者yichun1125 (小纯)
站内Statistics
标题[问题] 关机率学的数学问题，请各位大大帮忙，谢谢
时间Tue Aug 21 11:43:59 2007
An insurance company estimates that 40% of policyholders who have only an auto
policy will renew next year and 60% of policyholders who have only
a homeowners policy will renew next year.The company estimates that 80% of
policyholders who have both an auto and a homeowners policy will renew at
least at least one of those policies next year.
Company records show that 65% of policyholders have an auto pokicy, 50% of
policyholders have a homeowners policy, and 15%of policyholders have both an
auto and a homeowners policy.
Using the company's estimates, calaulate the percentage of policyholders that
will renew at least one policy next year.
请问这题的意思是在表达什麽？该如何计算？
谢谢
因为题目看不懂没办法算
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 220.133.153.206
1F：推 vipg5:0.68是答案吗? 08/22 23:21
2F：推 teddd:这是SOA的probability里的 sample question吧 不是有解答... 08/22 23:37
3F：推 NikeBoy:条件机率 08/17 00:09