两男两女进行兵乓球混合双打比赛,有几种配组方法,用排列组合

用插空法
5个女的先排成一排,有 5!种
5个女的之间,可以有6个空 ,从中选5个,有6种
5个男的全排列 5!
所以有 5!×6×5!＝86400

先找出sample size:2^4=16.所以一共有16种可能,分别是:GGGG,GGGB,GGBG,GGBB,GBGG,GBGB,GBBG,GBBB,BGGG,BGGB,BGBG,BGBB,BBGG,BBGB,BBBG,BBBB.B是BOY,G是GIRL.所以如果是两男两女的机率就应该是6/16=3/8=0.375=37.5%.

你是高一的吧?1、这道题目中的事件不互斥,所以不能用加法公式.2、这个既不属于交事件,也不属于并事件.这个解法（3/5）*（2/4）要等到高二学完排列组合后才能理解.3、以你目前的水平,可以这样想：从三男二女中抽取两...

测一测,自己测测就行!
对号入座：
呼吸器官：肺
消化器官：肝 胃 肠 脾
运动器官：肌肉 骨骼 关节
连一连：
狮子座 春季星空
飞马座 秋季星空
大犬座 冬季星空
天琴座 夏季星空

四种,因为是照片有左右顺序,是有序排列.
四个人,男女分别站好即可.
两男站两边,有两种站法.X1 X2 ,X2 X1
两女站中间,也有两种站法.Y1 Y2 ,Y2 Y1
所以,一共是2*2=4种站法.
如果要列出来就是：
X1 Y1 Y2 X2
X2 Y1 Y2 X1
X1 Y2 Y1 X2
X2 Y2 Y1 X2

9

这是一篇经典的名篇,也有一些版本可以参考：
2010年新年诗会——朱军、杨晨
（这个合诵他们都读错了就不说了,和上个差不多）——焦晃、倪萍
最简单的就是前面四段一人一段,最后一段合诵.中间剩下两段一人两句.

当蜘蛛网无情地查封了我的炉台
当灰烬的余烟叹息着贫困的悲哀
我依然固执地铺平失望的灰烬
用美丽的雪花写下：相信未来

当我的紫葡萄化为深秋的露水
当我的鲜花依偎在别人的情怀
我依然固执地用凝霜的枯藤
在凄凉的大地上写下：相信未来

我要用手指那涌向天边的排浪
我要用手掌那托住太阳的大海
摇曳着曙光那枝温暖漂亮的笔杆
用孩子的笔体写下：相信未来

我之所以坚定地相信未来
是我相信未来人们的眼睛
她有拨开历史风尘的睫毛
她有看透岁月篇章的瞳孔

不管人们对于我们腐烂的皮肉
那些迷途的惆怅、失败的苦痛
是寄予感动的热泪、深切的同情
还是给以轻蔑的微笑、辛辣的嘲讽

我坚信人们对于我们的脊骨
那无数次的探索、迷途、失败和成功
一定会给予热情、客观、公正的评定
是的,我焦急地等待着他们的评定

朋友,坚定地相信未来吧
相信不屈不挠的努力
相信战胜死亡的年轻
相信未来、热爱生命

光明之旅

自己动手,丰衣足食

一共有4320种 6个男的全排列 有六个空 用插空法 将5个女的放入
所以为6**3*2*1*6

由于数量不大,为便于理解,可将所有情况写出：（以下A为男；B为女）
共有16种情况：
全是男的：AAAA
一女三男：BAAA　ABAA　AABA　AAAB　
二男二女：ABAB　BABA　AABB　BBAA　ABBA　BAAB
三男一女：ABBB　BABB　BBAB　BBBA
全是女的：BBBB
基本事件16个
二男二女6个
所以,概率：P=6/16=3/8

5人英语短剧】阿拉丁传说 The Tale of Aladdin
【7人英语短剧】Cinderella 灰姑娘 7人 短剧
【The Gifts （礼物）】中英文短剧剧本
【4人英语短剧】阿拉丁传说 The Tale of Aladdin
灰姑娘的剧本
【7人英文话剧】花木兰 Mulan

Whose Fault
英语话剧剧本
Cast
Mr. Green
Miss Blue
Police
Nurse
Doctor
Daughter
--------------------------------------------------------------------------------
Scene I
(Green Garden St.)
(During the rush hours, when the street is crowded , Mr. Green is driving past the red light , unexpectedly a car accident happens... Two people came out of their cars angrily...)
Miss Blue: Oh! It's you, Mr. Green... Do you know how to drive your car?
Mr. Green: You see that I was driving across the road! Wow! There is a dent on my beloved BENZ.
Miss Blue: My BMW has got a dent too, you should compensate me.
(While they are quarrelling, later on, the police comes.)
Police: What's happened?
Mr. Green: She has bumped into my car!
Miss Blue: No! It is himself that drove past the red light...
(Quarrel again ...)
Police: Has any one been injured?
Mr. Green: I feel headache , foot ache , ache very much.
Miss Blue: I ache all over too.
(Both of them mourn painfully...)
Police: Then I'll call an ambulance (O-E-O-E ...).
--------------------------------------------------------------------------------
Scene II
(Blue Sky Hospital-Emergency)
(Ambulance sends them to the hospital)
Nurse: Who is injured?
(Both of them say it is themselves at the same time...)
Nurse: What's your name, Mr.?
Mr. Green: Call me DPP Green.
Nurse: (Unhappy facial expression) Oh! Go to the corner and sit there.
Mr. Green: But ... (nurse interrupts)
Nurse: Go! Don't speak any words.what's your name, Miss?
Miss Blue: My name is KMT Blue.
Nurse: (gentle and smiles) Oh, Miss this side, please. Would you tell me how you are feeling?
Miss Blue: Oh! I ache all over...
Nurse: OK! I'll help you stop the pain first, and then the doctor will treat you in a while.
(Mr. Green comes over to require medical treatment, but rejected)
Mr. Green: Nurse, I...I feel...
Nurse: Wait there, didn't you hear me?
(Mr. Green goes back helplessly, the doctor comes over at this moment...)
Nurse: The young lady called KMT Blue...KMT Blue.
Doctor: Ok! I see... How are you, Miss?
Miss Blue: I got an car accident and I ache all over...
Doctor: (Check) It's ok...don't worry about it. I'll give you some medicine. You'll get well soon.
Miss Blue: Thank you, doctor..
(Miss Blue leaves.)
Doctor: Next one. (Mr. Green comes in and Dr. reads his medical record) You are called DPP Green!
Mr. Green: Yeah! Any problem with that ?
Doctor: Hmm...(Consider) DPP Green (Raise up voice)? What's wrong with you?
Mr. Green: I ache all over-headache, toothache and foot ache (The doctor interrupts him impatiently) ...
Doctor: I... I... I see, Miss Lin – give Mr. Green an injection...
Mr. Green: What? An injection?
(Nurse takes out the syringe)
Nurse: Where do you want to inject?
(Mr. Green is frightened and shivering ...)
Mr. Green: Well, doctor ...that ...I do not ache anymore, I...I want to leave.
Nurse: Wait! Don't go...
(Nurse pulls Mr. Green and forces him to enter the injection room)
Mr. Green: Wow! . That hurts!
(Miss Blue goes out of the emergency room, but Mr. Green leaves in terrible pain.)
--------------------------------------------------------------------------------
Scene III
(Taiwan House)
(Both of them come back home, then open the door and go into the house at the same time...)
Daughter: Dad ...Mom ...What happened to both of you? Dad, you look pale. Mom, you look terrible, too.
Mr. Green: I would not be like this if not for your mother...
Miss Blue: What! That is your father's fault and he blames me impudently for...
(Daughter is cold and shrugs–then watching TV)
Daughter: Oh! I understand it. Even since the Presidential Election, there's no peace in our home.
(Both of them are still quarrelling .)

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