When three coins are thrown, what is the probability of getting at least tree head?
ans:1/2x1/2x1/2
定係:1/2x1/2x1/2x3
答案洗唔洗x3 o架??
一條好簡易的數!!(probability)
2007-12-31 11:38 am
回答 (2)
2007-12-31 11:48 am
✔ 最佳答案
1/2 x 1/2 x 1/2because for each coin, there is only one throw for it.
coin1
- head 1/2
- tail 1/2
coin2
- head 1/2
- tail 1/2
coin3
- head 1/2
- tail 1/2
for head, it would be (1/2 x 3)
ans: 1/2 x 1/2 x 1/2
^^
收錄日期: 2021-04-25 22:27:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071231000051KK00488