更新1:
1/6 is a wrong answer
probability
2009-10-30 2:57 am
John and Lily will go to have breakfast at a coffee shop in 9 a.m. to 12 a.m. and will stay there 30mins If they go to the coffee shop radomly, What is the probability they will meet?
回答 (3)
2009-10-30 6:10 am
✔ 最佳答案
畫一個3*3正方形。橫軸對應john﹐縱軸對應lily。則john和lily見到面的範圍是由(0,0.5),(0.5,0), (2.5,3) (3,2.5) 之間的面積。大小為 9-2*(2.5*2.5/2)=9-6.25=2.75。因此他們見面的概率=2.75/9=0.3056
2009-10-30 8:40 pm
9 a.m. to 12 a.m. ........
coffee shop 食早餐食到凌晨12點,`寫錯???
是否 9a.m. to 12p.m.
coffee shop 食早餐食到凌晨12點,`寫錯???
是否 9a.m. to 12p.m.
2009-10-30 3:53 am
(1/6)(1/6)(6)=1/6
2009-10-29 19:54:45 補充：
將時間分為六份
每份時間均有機會 所*6
2009-10-29 19:54:45 補充：
將時間分為六份
每份時間均有機會 所*6
收錄日期: 2021-04-23 18:21:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091029000051KK01131