plese show your steps.

来源: jinjing 于 2010-04-15 08:23:59 [] [旧帖] [给我悄悄话] 阅读数 : (134 bytes)
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回答: 回复：Boy Meets Girl 由 genier7 于 2010-04-15 02:24:30

First time I think it seems 1/3(5/6+5/6+5/6)=5/6.
Second time I...........1/3(5/6+5/6+3/6),as maybe someone can't wait 20 minites.

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