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两男两女3/8,三男一女1/4,三女一男1/4,四男或四女各是1/16.

qiuqiu (秋秋)
(#364610@0)
2002-2-10 -04:00
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Back To Topic: GMAT题,一对夫妇生了4个小孩,问2男2女的概率是多少?我的答案是1/5,但友人说是3/8。

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