请教几题DS

joywzy

17. At a certain university, if 50 percent of the people who inquire about admission policies actually submit applications for admission, what percent of those who submit applications for admission enroll in classes at the university?
(1) Fifteen percent of those who submit applications for admission are accepted at the university.
(2) Eighty percent of those who are accepted send a deposit to the university.

Ans: E 我选的是A：50% * 15% 难道enroll in classes at the university 不等于are accepted at the university?

21. If K is a positive integer less than 10 and N = 4,321 + K, what is the value of K?
(1) N is divisible by 3.
(2) N is divisible by 7.
Ans: B 我选C
因为（1）K可以是1，4，7，（2）K可以是2，9

22. A jewelry dealer initially offered a bracelet for sale at an asking price that would give a profit to the dealer of 40 percent of the original cost. What was the original cost of the bracelet?
(1) After reducing this asking price by 10 percent, the jewelry dealer sold the bracelet at a profit of $403.
(2) The jewelry dealer sold the bracelet for $1,953.
Ans: A 我选D
（1）设orignial price =X
X*90%*50%=403 可得X
（2）X*14=1953可得X

我发现DS不容易，老是出错。请指教。

isenetlab

17. the people who didn't inquire about admission policies may also submit applications for admission.
21. （1）K可以是2，5,8（2）K可以是5
22.Price=1.4Cost, so (1)1.4Cost*0.9-Cost=403 (2)the jewelry dealer sold it according to the initial price?, we don't know

Mush

以下是引用isenetlab在2003-1-13 11:05:27的发言：
17. the people who didn't inquire about admission policies may also submit applications for admission.
21. （1）K可以是2，5,8（2）K可以是5
22.Price=1.4Cost, so (1)1.4Cost*0.9-Cost=403 (2)the jewelry dealer sold it according to the initial price?, we don't know

完全同意楼上。

卧室春竹

我觉得第一个题目出的有问题......

those of submit applications 有两种理解啊！

1 全部投申请的人
     
2 那些咨询了且投了申请的人

如果按照大家的理解 问题中的 those 指的是全部的申请人

A 中的是指咨询且投了申请的人....

如果 他们俩个概念等同的话 那么应该选A 吧？！

stsww

1. i think that "be accepted" is diffrent from " enroll in class".
for example, if you are accepted by a school but you may refuse it and don't enroll in class.

Louisa_xy

17. At a certain university, if 50 percent of the people who inquire about admission policies actually submit applications for admission, what percent of those who submit applications for admission enroll in classes at the university?
(1) Fifteen percent of those who submit applications for admission are accepted at the university.
(2) Eighty percent of those who are accepted send a deposit to the university.

Ans: E
isenetlab“the people who didn't inquire about admission policies may also submit applications for admission.”即使这种情况确实存在，A告诉15%申请的人被录取，B 80%被录取的人预付学费
如果E选的话，就说明有些预付了部分学费的人没有enroll in classes？
与我国国情不合.... 需要咬文嚼字：-（

joywzy

我做DS经常出错，一部分由于粗心，如T21，是计算错误，另一部分由阅读问题，如T22，请教各位过来人没有什么好办法？
我这样子数字怕也拿不到什么好分数了。