作者king12355 (大冠)
看板Statistics
标题Re: [请益] 请问一个统计题目
时间Fri May 5 15:20:44 2006
※ 引述《vivian1003 (vivian1003)》之铭言：
: ※ [本文转录自 NTUstat 看板]
: 作者: vivian1003 (vivian1003) 看板: NTUstat
: 标题: [请益] 请问一个统计题目
: 时间: Fri May 5 00:25:47 2006
A company takes out an insurance policy to cover accidents that occur at
its manufacturing plant. The probability that one or more accidents will occur
during any given month is 3/5.
The number of accidents that occur in any given month is independent of the
number of accidents that occur in all other months.
Calculate the probability that there will be at least four months in
^^^^^^^^^^^^^^^^^^^^
which no accidents occur before the fourth month in which
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
at least one accident occurs.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
: (A) 0.01
: (B) 0.12
: (C) 0.23
: (D) 0.29
: (E) 0.41
英文部不懂得+1
尤其是做记号那边
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