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【OG20-P177-201题】
Team A and Team B are competing against each other in a game of tug-of-war. Team A, consisting of 3 males and 3 females, decides to line up male, female, male, female, male, female. The lineup that Team A chooses will be one of how many different possible lineups?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
分6个步骤
第一步 在第一个位置选男的有3种选择
第二步 在第二个位置选女的有3种选择
第三步 在第三个位置选男的有2种选择
第四步 在第四个位置选女的有2种选择
第五步 在第五个位置选男的有1种选择
第六步 在第六个位置选女的有1种选择
总共是3X3X2X2X1X1=36
242849xsmp
笔记:题目理解问题:问的是HLHLHL,这种类型排列有几种不同的可能,所以男内部有3!种,女也有3!种,3!*3!=36种可能
173448digd
C31 C31 C21 C21
Me too
选 D
【解析】
要求排队顺序是男,女,男,女,男,女。因此,只需要男生之间全排列,女生之间全排列即可,即
【知识补充】
你这只猪
排列组合依次讨论
hecmelo
设ABC男DEF女,ABC组合有六种,DEF组合有六种,所以是36
Doris999回复hecmelo
你好,我想问问,题目中有说一定要男女隔开吗,他不是只说男,女,男,女,男,女是其中一种情况吗?所以为什么不能6个人全排列呢?求大神解答
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2020-04-15 21:41:14
Doris999回复hecmelo
我突然明白了,我理解错了
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2020-04-15 21:42:39
Ninazhao回复 热爱一直
我还没明白你问的这个问题 你是咋想明白的
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2020-06-17 21:36:52
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