plese show your steps.

來源: jinjing 於 2010-04-15 08:23:59 [] [舊帖] [給我悄悄話] 閱讀數 : (134 bytes)
本帖於 2010-04-15 10:03:18 時間, 由版主 於德利 編輯
回答: 回複：Boy Meets Girl 由 genier7 於 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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