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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決
Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決 
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這一題數學怎麼算？（排列組合）
Sep 18th 2013, 08:48

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甲必須包含，所以其餘5人選出3人的組合有: 5*4*3/3*2=10 10種選法...
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