There are 3 men and 2 women in a tennis class.
If 2 persons are chosen at random to play a match,
find the probabilities that the 2 persons are 1 man and 1 woman.
我想知點計
個ans係 3/5
要算式唔要畫咩TREE DIAGRAM/TABLE
probability omg
2012-05-29 6:29 am
回答 (1)
2012-05-29 6:54 am
✔ 最佳答案
There are totally 5 persons.No. of ways to choose 2 persons randomly
= C(5,2)
= 5!/2!3!
= 10
No. of ways to choose 1 man from the 3 men and 1 woman from the 2 women
= C(3,1) x C(2,1)
= 3 x 2
= 6
The required probability
= 6/10
= 3/5
參考: micatkie
收錄日期: 2021-04-13 18:43:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120528000051KK00652