作者bestbestasan (没有动力阿....= =)
看板Statistics
标题[问题] 机统问题
时间Fri Oct 21 00:56:38 2005
An engineer want to move across the country from A to B to work. On
different days,she mails a letter and resume to 3 different companies in B.
Suppose that a letter sent from A to B has a probability of 0.7 of reaching
B within 3days.
(a)能够再三天内将三封信的两封传到B城市的可能性是多少?
(b)If the 3 letters are mailed together at the same time and location, how
does your conclusion in part a change? Explain.
没有机率和统计的版
所以我来统计版问
会不会很奇怪啊??
我不懂,就看很久写不出来
可以发问吗??
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