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.
(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. 说反了
2 回复广告的大多是35以下的非订阅者
(E) Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.作者: hangtianyuan 时间: 2010-5-4 22:09
orders分两种,1.orders by subscribers,2.orders by non-subscribers,E正好说明了1/2的某种关系,这样才能让上述两个结论准确
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