A teacher wants to divide a class of 18 students into 3 groups, each of 6 students, to do 3 different statistical projects.In how many ways can the students be grouped?
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Answer:18C6*12C6*6C6=17153136
點解唔使除3!?
Maths question!
2013-03-02 11:35 pm
回答 (3)
2013-03-03 2:51 am
✔ 最佳答案
因為係3 different statistical projects
2013-03-02 11:54 pm
重點在於「3 different statistical projects」
如果沒了這句，則需要除3!
如果沒了這句，則需要除3!
2013-03-02 11:37 pm
以我理解,每有EACH呢個字就是要除!
Is it correct?
Is it correct?
收錄日期: 2021-04-29 15:42:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130302000051KK00191