回复：Come on man...

来源: guest007 于 2010-05-28 17:33:20 [] [旧帖] [给我悄悄话] 阅读数 : (115 bytes)

:) do you understand this answer?

一家有两个孩子，其中一个是男孩。求这家有两个男孩的概率-

1/3

所有跟帖： 

• No I don't. Could you explain? -naeconi- ♂ 给 naeconi 发送悄悄话 (0 bytes) () 06/01/2010 postreply 07:28:15

• Never mind. Got it. -naeconi- ♂ 给 naeconi 发送悄悄话 (0 bytes) () 06/01/2010 postreply 07:35:18

• 回复：Never mind. Got it. -guest007- ♀ 给 guest007 发送悄悄话 (3 bytes) () 06/02/2010 postreply 07:35:56

• Also, can you confirm my understading of 13/27? -naeconi- ♂ 给 naeconi 发送悄悄话 (0 bytes) () 06/01/2010 postreply 07:29:01

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