回複：回複：回複：5/36

來源: wxczcbm 於 2010-02-07 22:20:10 [] [舊帖] [給我悄悄話] 閱讀數 : (160 bytes)
回答: 回複：5/36 由 jinjing 於 2010-02-04 14:07:29

The 1/4 for add numbers is wrong. Should be:
1/2 + 1/36 = 19/36 --- for one odd, one even number, plus (1, 1).
so the anser is:
19/36 - 1/9 = 5/12.

所有跟帖： 

• 回複：回複：回複：回複：5/36 -greenfarm- ♀ 給 greenfarm 發送悄悄話 (0 bytes) () 02/08/2010 postreply 10:13:27

• you are right. possibility for odd number is wrong -pj- ♂ 給 pj 發送悄悄話 (27 bytes) () 02/08/2010 postreply 14:09:53

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