意大利面条概率题

来源: 于 2012-08-10 09:07:47 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

 

A plate of pasta contains 100 strands of spaghetti.

Tie two loose ends.

Keep doing this until there are no more loose ends.

What is the expected number of loops at the end?