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Thirty percent of all merchandise orders placed by subscribers

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Thirty percent of all merchandise orders placed by subscribers [#permalink]

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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 thirtyfive 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.
[Reveal] Spoiler: OA

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Last edited by abhimahna on 13 Aug 2017, 00:58, edited 1 time in total.
Added OA.

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Re: Thirty percent of all merchandise orders placed by subscribers [#permalink]

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New post 22 Sep 2014, 23:30
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souvik101990 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?

As per the finding 1, of all the subscribers of the magazine, The 30 % of the order were made by people under age of 35.
As per finding 2,of all the orders, People over age of 35 placed most of the orders i.e this figure(orders placed by ppl over 35) should be greater than 50 %.

If both the facts have to true then all the orders cannot come from of all the subscribers of the magazine,.So, there must be another set of people i.e people who are not subscribers.

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.
Irrelevant. We are not concerned about who have never ordered.
B. Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now.
Irrelevant. We are concerned about only last year.
C. Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five.
Redundant.This is just another view of Finding of survey 1.
D. Last year, the average dollar amount of merchandise orders placed was less for subscribers under age thirtyfive than for those age thirty-five or over.
Incorrect. Not concerned about dollar amount.
E. Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.
CORRECT.
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Re: Thirty percent of all merchandise orders placed by subscribers [#permalink]

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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.

According to 1st survey: no. of orders placed by subscribers = 100; order by subscriber under 35 = 30 (i.e. 30%)

According to 2nd survey: if total orders = 200, order by people under 35 (subscribers and non subscribers) = 100+

E supports this directly!

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Re: Thirty percent of all merchandise orders placed by subscribers [#permalink]

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New post 12 Aug 2017, 05:18
VarunBhardwaj wrote:
souvik101990 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?

As per the finding 1, of all the subscribers of the magazine, The 30 % of the order were made by people under age of 35.
As per finding 2,of all the orders, People over age of 35 placed most of the orders i.e this figure(orders placed by ppl over 35) should be greater than 50 %.

If both the facts have to true then all the orders cannot come from of all the subscribers of the magazine,.So, there must be another set of people i.e people who are not subscribers.

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.
Irrelevant. We are not concerned about who have never ordered.
B. Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now.
Irrelevant. We are concerned about only last year.
C. Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five.
Redundant.This is just another view of Finding of survey 1.
D. Last year, the average dollar amount of merchandise orders placed was less for subscribers under age thirtyfive than for those age thirty-five or over.
Incorrect. Not concerned about dollar amount.
E. Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.
CORRECT.


Good analysis - but there seem few flaws ->
1) Choice C is not just the another way of saying the statement -1, but it is contradicting the findings put forward by advertisers.

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Re: Thirty percent of all merchandise orders placed by subscribers [#permalink]

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New post 12 Aug 2017, 07:36
Go for E

Wait for the OA.

Thank you

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Re: Thirty percent of all merchandise orders placed by subscribers [#permalink]

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New post 15 Aug 2017, 11:29
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. not worried about the people who never ordered merchandise

B. Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now. not worried about the proportion of the people reaching the age of 35

C. Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five. this is opposite of the premise

D. Last year, the average dollar amount of merchandise orders placed was less for subscribers under age thirtyfive than for those age thirty-five or over. not worried about dollar amount

E. Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.-Correct
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Re: Thirty percent of all merchandise orders placed by subscribers [#permalink]

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souvik101990 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. 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 thirtyfive 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.


What the first statement is basically telling is that among the subscribers to Systems magazine who purchased products in response to ads in the magazine, most were in fact over the age of thirty five. SO if Harvard Business Review posts an ad for special Harvard Business mugs and pens and shirts, then 75% of people who buy Harvard accessories are subscribers over 35 and 35% are subscribers under 35.

What the second statement tells us is that most of the people buying stuff because of ads in the magazine are thirty-five. How can that be? The majority of people buying stuff as a reponse to ads cannot be subscribers because then the majority of people buying stuff, say Harvard accessories, would have to be people over thirty-five. What E is basically saying is disregard the fact that most of subscribrs who bought stuff were over thirty-five because have a ton of other non-subscribers who are under 35 that buy our stuff. SO maybe a lot people just look at Harvard Business Review at the doctors office or grocery store and buy stuff but not many people actually subscribe to it.

E

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Re: Thirty percent of all merchandise orders placed by subscribers [#permalink]

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New post 14 Sep 2017, 04:06
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.
D. Last year, the average dollar amount of merchandise orders placed was less for subscribers under age thirtyfive than for those age thirty-five or over.

A,B, D : out of scope because of highlighted red part

C. Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five.

we know about under age 35. we don't know anything about these groups (=35, > 35)

E. Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.
this must be true:

Let's assume

A total of 100 merchandise orders were placed last year by the subscribers in response to the advertisement.
A total of 100 merchandise orders were placed last year by the NOn-subscribers in response to the advertisement.

It follows from #1 that
Subscribers under 35 years old = 30 orders
Subscribers equal-to/more than 35 years old = 70 orders

Most of the merchandise orders placed in response to advertisements in Systems last year were placed by people under age thirty-five.
To this be true
so at least 101 should be under 35.

So Non-Subscribers under 35 years old = 101-35 = 66

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

why E is true?? 100 subscriber = 100 non-suscriber
still both premises are correct.

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Re: Thirty percent of all merchandise orders placed by subscribers   [#permalink] 14 Sep 2017, 04:06
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