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?
(A) 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.
(B) Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now.
(C) Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five.
(D) 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.(E) Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.
-- by 会员 yakev6 (2012/4/25 13:19:36)
请问楼主，这一题的答案是C吗？ 我用排除法做的，不知道对不对。 A另一个范畴 B比今年多， New info。错误 Ddollar。。New info.错误 E是否subscriber，irrelevant.
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?
(A) 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.
(B) Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now.
(C) Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five.
(D) 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.(E) Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.
-- by 会员 yakev6 (2012/4/25 13:19:36)
请问楼主，这一题的答案是C吗？ 我用排除法做的，不知道对不对。 A另一个范畴 B比今年多， New info。错误 Ddollar。。New info.错误 E是否subscriber，irrelevant.
尽管分子/分母都是 "age <35"/"any age" most%的研究范围(scope)是 All of the AD-driven orders 30%的研究范围(scope)是 the AD-driven orders from subscribers 其实就是仔细比较原文的文字，就会发现"by subscribers"是区别。lz说的关注调查对象的思路，也很赞~
占了楼，给CR用。。。 一道逻辑题带来的反思。
12.(25359-!-item-!-188;#058&001894)
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?
(A) 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.
(B) Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now.
(C) Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five.
(D) 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.(E) Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
楼主
发表于 2012-4-26 18:30:18
即两方面：
发表于 2012-4-26 19:58:00
