Re: [問題] 請問一個統計題目
※ 引述《vivian1003 (vivian1003)》之銘言：
: ※ [本文轉錄自 NTUstat 看板]
: 作者: vivian1003 (vivian1003) 看板: NTUstat
: 標題: [請益] 請問一個統計題目
: 時間: 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
尤其是做記號那邊
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