标题: 问大家一道数学题~~~ [打印本页]
作者: tongxiaolong 时间: 2010-1-7 07:22 标题: 问大家一道数学题~~~
DS:
Each employees of Company Z is an employee of either Division X or Division Y,but not both, IF each division has some part-time employees, is the ratio of the number of full time employees to the number of part-time employees greater for Division X than for Company Z
(1) The ratio of the number of full-tim employees to the number of parttim employees is less for Division Y than for Company z
(2)More than half of the full-time employees of Company Z are employees of Divison x and more than half of the part-time employees of Company Zare employees of Division Y
题目干脆没理顺。。。NN帮帮我这个菜鸟。。。55555
作者: phdmass 时间: 2010-1-7 21:20
Contion:there are 2 divisions, x and y in company c. ratio(R)=full time/part time.
Question: Rx>Rc?
我觉得选B
作者: tongxiaolong 时间: 2010-1-8 21:33
后来我想了一下，你看看这样理解对不对:就是Z是xy 的总公司，也就是在X的全职员工数量+在Y 的全职员工数量=Z的全职员工数量。同理partim在X的数量+partime在Y 的数量=在Z的partime 的数量。。。
这样的话就理顺了。。选C
条件一也能退出来
不知道对不对。。。哎 prep上面的一道题
作者: yoyo9012 时间: 2010-1-9 21:11
我和你理解的一样。选C，那就是说B不能单独推出来？
作者: phdmass 时间: 2010-1-11 21:44
假设公司C总共有full-time a人，Part-time b人；部门X有full-time c人， part-time d
人，部门Y有full-time e 人，part-time f人。并且a=c+e,b=d+f.题目其实问的就是e/f是不是
大于a/b
条件一 是说 e/f小于a/b ，但是a-e与b-f的关系就难以确定了
而条件二。由于c>0.5a,d<0.5b,可以推断出一定是大于
请tx指正
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