三对夫妇去上海世博会参观,在中国馆前拍照留念,6人排成一排,每对夫妇必须相邻,不同的排法种数为( )
C
向“曼丽”请教:
数学问题:六们身高全不同来自的同学拍照留念
(1)6人全排列6!=720,最高3人排前排3!=6,最矮3人排后排3!=6,∴P=6×6/720=慢核宪聚快片1/20.(2)从20人中选2人,有C(20,2)=190.属于同...
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三对夫妇去上海世博会参观,在中国馆前拍照留念,6人排成一排,每对夫妇必须相邻,不同的排法种数为( )
spanC解析:解:采360问答用捆绑及内部调整法,把三对夫妇看成三个整体,每对夫妇都有2种排列顺序,故不同的排法种数为A33×2×2×2=6×8=48,故选C.
3坐适新短越名学生与1位老师站成一排来自拍照留念,老师一定要站在左起第二位,一共有几种不同?
6种设同学分别为ABC,老师为T则有以下几种排法:ATB课参CATCBBTACBTCACTABCTBA所以可历草以排六种
你来自们觉得到一个地方是拍照留念下来好呢还是直接用眼睛看用心记住好?
这两种不同的记录方式,各有各的优点,当然我更倾向于后者。为什么一定要拍照留念下来呢?每个导井量力落居缺收乐人都会经历童年到老年,我们拍照留念时候不见得都是给自己看360问答的。现...
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4个好朋友在旅游景点拍照留念(不考虑站的顺序),共有多少种不同的照法?答案上是4...
4个人一起照只有1种任镇极单宽意3个人一起照有4种,任审史必促钟侵至翻厚掌意2个一起照有6种,每个人自己京病设照有4种所以共有15种.4个照和每个人自己照很好理解.3个人一起,2...
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丽丽和爸爸妈妈一起去迪士尼乐园,想和米奇拍照留念,他们有多少种不同的站法?
你好,是四种吧,妈妈和丽丽,爸爸和丽丽,妈妈和爸爸,还有他们三个一起!
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小明,小花,小林3人去游玩,想拍照留念,问可拍出几张不同的照片?(不分顺序)
那什军得看你相机有多大内存和有多少电量了!如果是数学问题,不分任何顺序来自,仅仅以图片人物数量作区别,就一共可以拍8张!(风景照也一样可以留念吧)
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一,旅游景区虚拟自动抓拍系统简介旅游景浓三夜欢占绍湖至温区虚拟自动抓拍系统是通队解过绿背影抠像技术和影像合成技术实现,观众走进绿色的游戏区域内,会部顾艺轻整而多回故展看见自己的影...
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没事的。拍照留念嘛来自,不都是这么讲么!相同点:都是依依不舍,区别:两者程度不同,前者留恋比留念情感强一点,“恋”有依赖、痴迷、对其对象能获取一定的满足和挂念,而“念”只是普通情...
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