坐飛機 - 拼圖

By Gilbert
at 2011-09-19T19:08
at 2011-09-19T19:08
Table of Contents
一共有n個人上飛機,飛機上n個位置,每個人都有自己對應的位置。
但今天第一個人很迷糊,所以會隨機做任何一個位置。
後面的人如果自己的位置被別人坐了,則會隨機去坐剩下的位置,
如果自己的位置沒有被坐,則會做自己的位置。
請問,第n個人坐到自己位置的機率為?
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好像有看過但是/不到,與大家分享。
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