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三个人排成一排照相有多少种方法
更新时间: 2020-11-04 00:00:00  

3人排成一排照相,一共有6种排法,还可以用全排列求解:A(3,3)=3×2×1=6。设这三个人是甲乙丙,可能的排列有(1)甲、乙、丙;(2)甲、丙、乙;(3)乙、甲、丙;(4)乙、丙、甲;(5)丙、甲、乙;(6)丙、乙、甲。

关键词: 个人 排成 照相 多少 方法

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