概率題

一家有兩個孩子，其中一個是星期二出生的男孩。求這家有兩個男孩的概率

所有跟帖： 

• 回複：概率題 -屋漏痕- ♂ (5 bytes) () 05/27/2010 postreply 06:16:36

• 回複：回複：概率題 -guest007- ♀ (20 bytes) () 05/27/2010 postreply 06:42:38

• If you are right,it shoul be from real data.P(b)=13/27 -jinjing- ♀ (122 bytes) () 05/27/2010 postreply 08:25:23

• 回複：If you are right,it shoul be from real data.P(b)=13/27 -guest007- ♀ (469 bytes) () 05/28/2010 postreply 12:51:57

• You want to creat a new fuzzy, or fussy Math.? -jinjing- ♀ (16 bytes) () 05/28/2010 postreply 13:56:40

• Come on man... -naeconi- ♂ (1311 bytes) () 05/28/2010 postreply 14:29:52

• An most importantly, why is the day of birth relevant? -naeconi- ♂ (0 bytes) () 05/28/2010 postreply 14:38:53

• 回複：Come on man... -guest007- ♀ (115 bytes) () 05/28/2010 postreply 17:33:20

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

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

• 回複：Never mind. Got it. -guest007- ♀ (3 bytes) () 06/02/2010 postreply 07:35:56

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

• 1/3 -endofsuburbia- ♂ (0 bytes) () 05/27/2010 postreply 08:52:56

• Agree -屋漏痕- ♂ (0 bytes) () 05/27/2010 postreply 09:28:06

• 回複：Agree -guest007- ♀ (22 bytes) () 05/27/2010 postreply 10:33:21

• I was wrong. I'll change my answer again if necessary. -屋漏痕- ♂ (0 bytes) () 05/27/2010 postreply 11:53:04

• 1/2 -AnaZhang- ♀ (0 bytes) () 05/27/2010 postreply 20:05:04

• If you don't know the order the answer is 1/3 -jinjing- ♀ (206 bytes) () 05/28/2010 postreply 18:28:25

• If m boys and n girls,answer is (m-1)/(m+n-1) -jinjing- ♀ (42 bytes) () 05/30/2010 postreply 08:35:27