- UID
- 496434
- 在线时间
- 小时
- 注册时间
- 2009-12-16
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
PS. Law firm has branches in X,Y andZ states. Each Lawyer has either a license in one state or in all three states. there are 10, 11, 13 lawyers licensed in the 3 states respectively. there are 28 lawyers in total in the firm. how many lawyers work in state Z?
这个题我看了前面各位大虾的解答
我发表一点个人算法:
首先,有一个概念想澄清一下,不知大家是否同意:问题中的work in Z与licensed in Z是不同的。只在Z中注册的一定在Z work,但三个都注册了的,不一定在Z工作,对伐?
那么,(10-x)+(11-x)+(13-x)=28-x;x为三个都注册了的人,则x为3
然后,Z工作的至少为10人,对伐
再然后,如果那三个仔中有一个在Z,那么还有两个在另外两个机构,那么总人数为30了
以此类推。所以我个人认为是10个人 |
|