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Finding of a survey of Systems magazine subscribers: Thirty

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Manager
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Finding of a survey of Systems magazine subscribers: Thirty [#permalink]

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31 Oct 2006, 09:14
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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. 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.

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VP
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31 Oct 2006, 09:51
E explains both the cases.

Majority of the respondents to the advertisements are not subscribers. That way they can be "most" for advertisers, and 30% for magazine subscribers.
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Senior Manager
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31 Oct 2006, 13:35
A is a safe bet. Uses inverted logic ..

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Director
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31 Oct 2006, 23:59
I'll pick E
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VP
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01 Nov 2006, 02:41
E only.

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VP
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Schools: Wharton (R2 - submitted); HBS (R2 - submitted); IIMA (admitted for 1 year PGPX)

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01 Nov 2006, 06:28
One more E. Please post OA..

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01 Nov 2006, 18:50
I picked A and this was my reasoning: If there are 10 subscribers, then 3 bought merchandise and are under 35. Since the other survey says that most people who bought merchandise are under 35, the 3 from the previous survey should belong to the majority of merchandise buyers. This implies that out of the 7 that are over 35 less than 3 bought merchandise as this has to be in the minority.

In other words there are more people in the age 35 and over category who did not buy merchandise than there are in the under age 35 category.

I wanted to pick E but it seems out of scope since it talks about buyers who are not subscribers.

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VP
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01 Nov 2006, 19:08
the difference between the 2 arguments is pointed out in E.

so it must be E. It is those non-subscribers who changed the survey results.

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Senior Manager
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02 Nov 2006, 03:28
Tough one for me ..but finally got E...

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Manager
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03 Nov 2006, 21:50
Ok..

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03 Nov 2006, 21:50
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