1)101/188
2)27/196
3)3/4,1/7
4)101/1372
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4)1/14, 原答案是挑出周二男孩(不排除二男孩)
-jinjing-
♀
(0 bytes)
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02/08/2011 postreply
19:53:31
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回複:1)題目不清?重複一遍
-wushuihe-
♂
(196 bytes)
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02/09/2011 postreply
02:08:56
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13/27
-jinjing-
♀
(50 bytes)
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02/09/2011 postreply
12:09:30
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