标题: MATH JJ 求教 [打印本页] 作者: redli 时间: 2002-9-4 23:20 标题: MATH JJ 求教
25。Q:The ratio of the number of women to the number of men to the number
of children in a room is 5:2:7,
What is the number of women?
1)the total number of women and children in the room is 12;
2)the number of men is less than 4;
答案选C,
我的想法:A,设人数分别为5X,2X,7X,所以5X+7X=12,可求出X
1. I agree on D.
2. I think we should clarify the meaning of the question. 有3间客房,有两位侍应生分别送酒和点心,可以在3个时间段送,但每个时间段不能给一个客房既送酒又送点心,问有几种送法? "可以在3个时间段送" ---> many mixing way.
a. C3,2 =6
b. (C3,2 *C2,1+C3,2*2)*P2,2=24
c. (C3,1+C3,2+1+1)*2=16
So, total will be 46作者: cook 时间: 2002-9-5 12:30
Sorry, About 2. the most probably answer is 12.
欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/)