作者bunyham (☆★魔动王★☆)
看板Statistics
标题[问题] 机率
时间Wed Feb 20 07:50:28 2008
可以麻烦高手们帮我解答一下嘛?
A commuter plane has 30 seats. The airline has sold 33 tickets for the next
flight. The no-show rate is 5%.
A couple traveling together are on standby for this flight.
What is the probability that both the standby passengers will
be able to get on the flight because of no‐shows?
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1F：推 chrisjon:30个座位卖33张票，有5%的人不会来登机 02/20 09:04
2F：→ chrisjon:一对夫妻要搭机且能後补得上，所以必需至少5人没来登机 02/20 09:05
3F：→ chrisjon:简单的说，就是在求X~B(33,0.05) P(X>=5) 02/20 09:05