F.4 MATHS..............................
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F.4 MATHS
2010-07-16 9:38 pm
回答 (2)
2010-07-16 9:43 pm
✔ 最佳答案
Let the line be : A__1__2__3__4__5__B(A = 0 , B = 6)Since AP >= 2BP , So(P - A) >= 2(B - P)P >= 2(6 - P)P >= 12 - 2P3P >= 12P >= 4So P canbe 4 or 5 (two points) for AP >= 2BP ,P(E) = 2/5 
2010-07-16 9:45 pm
There are five points one the line
That's mean there are 5 possible cases
If AP >= 2BP
AP should contain 4 parts and 5 parts
It means 2 cases can fulfill AP >= 2BP
So, the probability is 2/5 = 40%
That's mean there are 5 possible cases
If AP >= 2BP
AP should contain 4 parts and 5 parts
It means 2 cases can fulfill AP >= 2BP
So, the probability is 2/5 = 40%
收錄日期: 2021-04-21 22:12:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100716000051KK00697