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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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數學 五人排成一列不完全相鄰
Sep 30th 2013, 17:49

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先算5個人隨便排: 5!=120 再扣掉甲乙丙完全相鄰: 3!x3!(甲乙丙可互換)=36 120-36=84 →甲乙丙不完全相鄰...
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    線上遊戲排行榜2013/2014,進擊的巨人線上看,candy crush saga外掛,正妹寫真三圍

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