求助 涛涛 GWD11_11

Q11:请教NN，这道题我就没有读懂。。。。。。

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: E

对杂志订购者的调查： 看了杂志后，３５岁以下的杂志订购者的购买占全部杂志订购者购买的３０％。
对广告商的调查：     在所有受杂志广告影响下的购买中，35岁以下的人占了大多数。

要以上两个条件都成立，必须有很多35以下的人受到杂志广告的影响而去购买商品，但是并没有订购杂志。这样才能把受杂志广告影响的人而购买的人的比例由30%提高到most大部分.

次题比较饶，本人表达能力有限，说的有点乱。

由订阅杂志的人所定购的商品中30％是订阅杂志的35岁以下的人－－－－－－－1

广告商说的是全部的订购商品的人中，35岁以下的人是绝大多数－－－－2

2包括1

要解释的话

就是说：除去看杂志上广告买商品的订阅者以外，应该还有其他的35岁以下的人买了商品，这些人不订阅杂志也就看不到广告

E就是这样一个选项。

看这题就像绕口令