一道实在想不通的gwd,请教大侠们了!!

jiubuxihuan

Q11:？？？

Finding of a survey of Systems magazine subscribers:  Thirty percent of all merchandise orders placed by subscribers in response to advertisements in the magazine last year were placed by subscribers under age thirty-five.

 

Finding of a survey of advertisers in Systems magazine:  Most of the merchandise orders placed in response to advertisements in Systems last year were placed by people under age thirty-five.

 

For both of the findings to be accurate, which of the following must be true?

 

1. More subscribers to Systems who have never ordered merchandise in response to advertisements in the magazine are age thirty-five or over than are under age thirty-five.
2. Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now.
3. Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five.
4. Last year, the average dollar amount of merchandise orders placed was less for subscribers under age thirty-five than for those age thirty-five or over.
5. Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.

   Answer:

如何有原文推出E这个结果？

jtleon

merchandise ordered by subcribers, 30% 是 <35 岁

total merchandise ordered by peoples, 大多数是 < 35 岁

既然大多数购买在杂志打广告的产品是>35岁的人,但是subscribers购买的人里,只有30%是<35岁, 所以很多买产品的人不是subscriber.

gonghao

定杂志的人的调查：【因看杂志广告而做的订单】中的30％是35岁以下的人做的

广告商的调查：绝大多数【因看杂志广告而做的订单】都是35岁以下的人做的。

那也就是说，广告商的结果里，不仅包含了【定杂志的人的调查】的人员，还有一些不定杂志而下订单的人，也有些35岁以上定杂志而做订单的人。

E说的就是不定杂志而下订单的人