|
| 阅读上一个主题 :: 阅读下一个主题 |
| 作者 |
 也答认真的数学题（正误版，请斑竹删去楼下同名帖） |
 |
| 所跟贴 |
也答认真的数学题（正误版，请斑竹删去楼下同名帖） -- Anonymous - (1488 Byte) 2003-5-22 周四, 上午10:55 (524 reads) |
RA
[博客]
[个人文集]
游客
|
|
|
作者：Anonymous 在 罕见奇谈 发贴, 来自 http://www.hjclub.org
第一题的解答: No one can give birth to unlimited number of kids, so 1:1 is wrong.
My assumption is that the couple will stop at 2 regardless we they have: The outcome is
One boy: 0.5
Two girls: 0.25
A boy and a girl: 0.25.
The male and female ratio is 5:3 in such a case.
第二题的解答: Again make simple assumtion: male and female all get married at 20 and die at 70. Old male always have priorty over younger one in terms of getting a spouse. If every male and female are matched today in the society. And boy and girl grow into their 20 at 100 to 90 ratio in the future. It will take 500 years until some man will not find a wife.
作者：Anonymous 在 罕见奇谈 发贴, 来自 http://www.hjclub.org |
|
|
| 返回顶端 |
|
 |
- 你自己搞错了 -- 人之初 - (608 Byte) 2003-5-22 周四, 下午10:16 (147 reads)
|
|
|
您不能在本论坛发表新主题
您不能在本论坛回复主题
您不能在本论坛编辑自己的文章
您不能在本论坛删除自己的文章
您不能在本论坛发表投票
您不能在这个论坛添加附件
您不能在这个论坛下载文件
|
based on phpbb, All rights reserved.
|
