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# Finding of a survey of SYSTEMS magazine subscribers: Thirty

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Manager
Joined: 24 Apr 2008
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Finding of a survey of SYSTEMS magazine subscribers: Thirty [#permalink]

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26 Apr 2008, 08:48
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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. Most 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.

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SVP
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Re: CR - magazine survey [#permalink]

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26 Apr 2008, 17:48
is it E ?

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SVP
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Re: CR - magazine survey [#permalink]

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26 Apr 2008, 19:49
quiet888 wrote:
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. Most 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.

E.
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Manager
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Re: CR - magazine survey [#permalink]

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27 Apr 2008, 10:25
E is indeed the correct answer.
But I still don't answer why E. Care to explain?

Thank you.

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Director
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Re: CR - magazine survey [#permalink]

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30 Apr 2008, 12:45
2
KUDOS
The magazine reports that 30% of the subscribers who bought stuff were under the age of 35. So assume 100 people bought stuff and 30 are age 35 or less.

The advertisers report that most of the people who bought stuff were under the age of 35. So again, if 100 people bought stuff then at least 51 were under 35 and the rest were over 35.

Since we know that there are only 30 subscribers that are under 35 then there must be some nonsubscribers under 35 as well.

E. Last year many people who placed orders for merchandise in response to advertisements in SYSTEMS were not subscribers to the magazine.

A good tip is took look at words like "all", "most", "many", "some," etc. How many is many....5, 6, 40, 100? "Some" and "Many" are a lot easier to prove than "most" or "all".

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Manager
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Re: CR - magazine survey [#permalink]

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30 Apr 2008, 14:24
I agree. E
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MBA Blog: University of Minnesota Carlson School of Management- http://unconventionalapplicant.blogspot.com/

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Senior Manager
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Re: CR - magazine survey [#permalink]

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02 May 2008, 20:14
I went for A

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Director
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Re: CR - magazine survey [#permalink]

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02 May 2008, 21:56
A. Most 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. [Definitely not provided as part of the argument – eliminate it]

B. Among subscribers to SYSTEMS, the proportion who are under age thirty-five was considerably lower last year than it is now. [ “Now” is not provided – Eliminate it]

C. Most merchandise orders placed in response to advertisements in SYSTEMS last year were placed by SYSTEMS subscribers over age thirty-five. [Hold it]

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. [Average dollar amount is not provided as part of the argument – eliminate it]

E. Last year many people who placed orders for merchandise in response to advertisements in SYSTEMS were not subscribers to the magazine. [Hold it]

Between C and E: As per arguiment most of the orders placed by SYSTEM are users under age 35. Definitely not.

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Manager
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Re: CR - magazine survey [#permalink]

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03 May 2008, 06:50
Through POE, I am going with E.

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Senior Manager
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Re: CR - magazine survey [#permalink]

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03 May 2008, 07:58
gixxer1000 +1.very good explanation on the process of Poe.

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Intern
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Re: CR - magazine survey [#permalink]

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05 May 2008, 14:52
Ah.. it took me forever to understand the stimulus.

gixxer1000's explanation is great and helped me to see the core. I just would like to add one thing to his explanation.

It seems that we can not assume that there's 30 people (subscriber & under 35) and there's 51 people (by his definition of "most"), then conclude that there's some non-subscriber under 35. All we know for sure is that

# of orders placed by Systems' subscriber under 35 < total # of order placed under 35 (reported by the advertisers)

My reasoning is that ..

1. there's 30%(total number of people unknown, and we do not need to know) order placed by subscribers of Systems, under 35

2. "Finding of a survey of ad" suggests that "Most of the merchandise" were sold by people under 35. This suggests that there's MORE orders than all the orders from #1.(still we do not know how much more)

I think the key word here is "Most.", the phrase "Most of the merchanside orders placed ...." suggests that there must be SOME additional orders from somewhere.

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Re: CR - magazine survey   [#permalink] 05 May 2008, 14:52
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# Finding of a survey of SYSTEMS magazine subscribers: Thirty

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