從12個(gè)人里面選4個(gè)人放在一組：12C4 = 495 種
從剩下的8個(gè)人里面選4個(gè)人放在一組：8C4 = 70 種
從剩下的4個(gè)人里面選3個(gè)人放一組：4C3 = 4 種
一個(gè)人被排除在外的選法有：12 種
總共方法數(shù)為 495 x 70 x 4 x 12 / 4! = 69300
find the number of ways in which 12 people can be divided into .
find the number of ways in which 12 people can be divided into .
find the number of ways in which 12 people can be divided into three groups consisting of 4,4 and 3 people with one person excluded.
答案是69300
find the number of ways in which 12 people can be divided into three groups consisting of 4,4 and 3 people with one person excluded.
答案是69300
英語人氣：132 ℃時(shí)間：2019-10-17 08:15:43
優(yōu)質(zhì)解答
我來回答
類似推薦
- The thought patterns of westerners differ much ____Chinese people in a number of ways.
- 世界上哪種語言說的人最多?Which______________number of people in the world?
- Which counter has the highest number of people in the world?
- Find the smallest number which can be multhiplied(倍數(shù))by 112 to give a square number
- some of the ways in which people in Europe adapted to them.
- 如圖,在三角形ABC中,D是BC邊上的一點(diǎn),并且∠DAC=∠B,試說明：∠ADC=∠BAC.
- 求人物細(xì)節(jié)描寫初一作文
- “雞和兔的數(shù)量相同,兩種動(dòng)物的腿加起來共有48條,雞和兔各多少只?要用方程解的哦!
- the best gift i have ever received
- 用愕然、化為烏有造句
- 英語1001
- 花季這個(gè)詞 怎樣用英語翻譯
猜你喜歡
- 116、讀下面的詩句,想一想,劃線的詞語在詩中指的是誰,填在括號里.
- 2青出于藍(lán)勝于藍(lán).莫等閑,白了少年頭,空悲切.天下興亡,匹夫有責(zé).各是誰寫的
- 3王張李三人在一起,其中一位是教授,一位是博士,一位是副教授.現(xiàn)在知道李比教授年齡大,
- 4Is his home on the 2nd floor?否定形式回答是什么?
- 5大家?guī)兔垂ぁび嘘P(guān)物體運(yùn)動(dòng)的.
- 6常見的物體都是由什么組成的,它們總是在不斷地什么著
- 7我會為了我的理想而奮斗的英語、各位好心人吶、幫幫忙吖~
- 8英語中共有哪幾種構(gòu)詞法?
- 9how many 什么do you have
- 10一個(gè)口袋里有5只球,編號為1,2,3,4,5,在袋中同時(shí)取出3只,以X表示取出的3個(gè)球中的最小號碼,X是離散型隨機(jī)變量嗎?若是,請指出它的所有可能值,并求X的分布列.
- 11高一作文800字,
- 126.9×7.99+0.69×20.1簡便方法