It is currently 17 Oct 2017, 04:48

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Finding of a survey of Systems magazine subscribers: Thirty

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

1 KUDOS received
Manager
Manager
avatar
Joined: 06 Aug 2010
Posts: 218

Kudos [?]: 225 [1], given: 5

Location: Boston
Re: gmatprep CR - tricky one! [#permalink]

Show Tags

New post 03 Sep 2010, 08:20
1
This post received
KUDOS
I said (C). I don't understand how it can be (E) - you don't really have the information to determine how many non-subscribers placed orders, which is what (E) is talking about. For example, what if 100 subscribers placed orders, and 30 of them were under age 35, while only 5 non-subscribers placed orders, and 4 of them were under age 35? Then both findings are still correct, but (E) is false (unless we're going on some very arbitrary definition of "many").

(C) fits both findings the best. 70% of subscribers who placed orders were age 35 or over, a big majority. The only way to make (C) not true is if the number of non-subscribers who placed orders is larger than the number of subscribers who placed orders - and even then, you can't really determine whether or not the 30% of subscribers under 35 + the "most" of non-subscribers under 35 outnumber the 70% of subscribers + the remaining non-subscribers.

Really it seems like the question doesn't give you enough info to properly answer it, but I think (C) is a better answer than (E), given the assumptions you have to make to choose either one.

Kudos [?]: 225 [1], given: 5

Expert Post
2 KUDOS received
GMAT Tutor
avatar
B
Joined: 24 Jun 2008
Posts: 1339

Kudos [?]: 1951 [2], given: 6

Re: gmatprep CR - tricky one! [#permalink]

Show Tags

New post 03 Sep 2010, 10:11
2
This post received
KUDOS
Expert's post
TehJay wrote:
I said (C). I don't understand how it can be (E) - you don't really have the information to determine how many non-subscribers placed orders, which is what (E) is talking about. For example, what if 100 subscribers placed orders, and 30 of them were under age 35, while only 5 non-subscribers placed orders, and 4 of them were under age 35? Then both findings are still correct, but (E) is false (unless we're going on some very arbitrary definition of "many").


No, you may have misinterpreted one of the two findings. The second finding says that most orders were placed by people under 35; that includes orders from both subscribers and non-subscribers. I think you are interpreting that finding to be about orders from non-subscribers only, but it's not. So in your hypothetical example, you have 105 orders in total, but still, only 34 orders come from people under the age of thirty-five. That isn't consistent with the second finding in the stem which tells us that most orders come from under-thirty-fives, so is not a possible scenario.

TehJay wrote:
(C) fits both findings the best. 70% of subscribers who placed orders were age 35 or over, a big majority. The only way to make (C) not true is if the number of non-subscribers who placed orders is larger than the number of subscribers who placed orders - and even then, you can't really determine whether or not the 30% of subscribers under 35 + the "most" of non-subscribers under 35 outnumber the 70% of subscribers + the remaining non-subscribers.


It's actually mathematically impossible for C to be true. Say you have S subscribers and N non-subscribers who placed orders. We know that 0.7S orders came from subscribers over thirty-five. Say you have X orders in total from non-subscribers over 35. We know from the second finding that less than half of all orders come from people over thirty-five, so:

(0.7S + X)/(N+S) < 1/2

But the proportion of all orders coming from subscribers over thirty-five is 0.7S/(N+S), and this is clearly less than the left side of the inequality above, so must be less than one half. So it's impossible for 'most' orders to have come from subscribers over thirty-five, and C cannot be true.
_________________

GMAT Tutor in Toronto

If you are looking for online GMAT math tutoring, or if you are interested in buying my advanced Quant books and problem sets, please contact me at ianstewartgmat at gmail.com

Kudos [?]: 1951 [2], given: 6

VP
VP
avatar
Joined: 17 Feb 2010
Posts: 1478

Kudos [?]: 756 [0], given: 6

Re: gmatprep CR - tricky one! [#permalink]

Show Tags

New post 04 Sep 2010, 08:41
good question. agree with E.

Kudos [?]: 756 [0], given: 6

Senior Manager
Senior Manager
avatar
Joined: 18 Feb 2008
Posts: 494

Kudos [?]: 125 [0], given: 66

Location: Kolkata
Re: gmatprep CR - tricky one! [#permalink]

Show Tags

New post 04 Sep 2010, 11:28
Seeing it first time....these type of questions...Good one

Kudos [?]: 125 [0], given: 66

Manager
Manager
avatar
Affiliations: NCC,SAE,YHIA
Joined: 04 May 2010
Posts: 51

Kudos [?]: 20 [0], given: 2

Location: Mumbai , India
WE 1: 3 years international sales & mktg-projects
Re: gmatprep CR - tricky one! [#permalink]

Show Tags

New post 04 Sep 2010, 11:42
Findings of magazine: 30% of the orders placed by subscribers in response to advertisements were placed by subscribers under the age 35.

Findings of the advertiser: most of the orders placed in response to advertisements were placed by people under the age 35.

As already illustrated by nusmavrik the argument subtly shifts from subscribers to general population.

Most in advertiser's finding means >50%.

Let us assume total 100 orders were placed in response to advertisement in the magazine.
Therefore at least 50 people who ordered were under the age of 35 as per advertiser's finding.

In case all the above 100 people were subscribers of the magazine.
Which means only 30 people under the age of 35 placed the order.

It follows from above that orders placed by subcribers = total orders placed cannot be true, since advertiser's survey finding states that 50 people were under 35.
Moreover number of orders placed by subscribers cannot be more than total orders placed.

Therefore the orders placed by subscribers has to be less than the total number of orders,
==>ie. part of the orders were placed by non subscribers of the magazine.
_________________

Sun Tzu-Victorious warriors win first and then go to war, while defeated warriors go to war first and then seek to win.

Kudos [?]: 20 [0], given: 2

Senior Manager
Senior Manager
User avatar
Affiliations: Volunteer Operation Smile India, Creative Head of College IEEE branch (2009-10), Chief Editor College Magazine (2009), Finance Head College Magazine (2008)
Joined: 26 Jul 2010
Posts: 461

Kudos [?]: 174 [0], given: 24

Location: India
WE2: Entrepreneur (E-commerce - The Laptop Skin Vault)
Concentration: Marketing, Entrepreneurship
GMAT 1: 710 Q49 V38
WE: Marketing (Other)
GMAT ToolKit User
Re: gmatprep CR - tricky one! [#permalink]

Show Tags

New post 06 Sep 2010, 11:20
Nice!!
_________________

Kidchaos

http://www.laptopskinvault.com

Follow The Laptop Skin Vault on:
Facebook: http://www.facebook.com/TheLaptopSkinVault
Twitter: http://www.twitter.com/LaptopSkinVault

Consider Kudos if you think the Post is good
Unless someone like you cares a whole awful lot. Nothing is going to change. It's not. - Dr. Seuss

Kudos [?]: 174 [0], given: 24

1 KUDOS received
Manager
Manager
User avatar
Status: what we want to do, do it as soon as possible
Joined: 24 May 2010
Posts: 108

Kudos [?]: 73 [1], given: 315

Location: Vietnam
WE 1: 5.0
Re: gmatprep CR - tricky one! [#permalink]

Show Tags

New post 01 Jan 2011, 03:01
1
This post received
KUDOS
i think E correct because E can be translated to the assumption that many people under the age of 35 who read the advertisement on the magazine decided to order merchandise but many of them did not buy magazine. They could read by chance.
C is counter fact.
_________________

Consider giving me kudos if you find my explanations helpful so i can learn how to express ideas to people more understandable.

Kudos [?]: 73 [1], given: 315

Manager
Manager
avatar
Joined: 04 Sep 2010
Posts: 72

Kudos [?]: 16 [0], given: 11

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

Show Tags

New post 29 May 2011, 09:51
E because of above reasons

Kudos [?]: 16 [0], given: 11

Manager
Manager
avatar
Status: UC Berkeley 2012
Joined: 03 Jul 2010
Posts: 190

Kudos [?]: 19 [0], given: 10

Location: United States
Concentration: Economics, Finance
GPA: 4
WE: Consulting (Investment Banking)
GMAT ToolKit User
Re: Finding of a survey of Systems magazine subscribers: Thirty [#permalink]

Show Tags

New post 30 May 2011, 05:47
E, but took me two minutes!

Kudos [?]: 19 [0], given: 10

Senior Manager
Senior Manager
avatar
Joined: 17 May 2010
Posts: 287

Kudos [?]: 55 [0], given: 7

GMAT 1: 710 Q47 V40
Re: Finding of a survey of Systems magazine subscribers: Thirty [#permalink]

Show Tags

New post 30 May 2011, 07:33
E. It's the only option that reconciles the two different surveys.
_________________

If you like my post, consider giving me KUDOS!

Kudos [?]: 55 [0], given: 7

Retired Moderator
User avatar
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1637

Kudos [?]: 1103 [0], given: 109

Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Re: Finding of a survey of Systems magazine subscribers: Thirty [#permalink]

Show Tags

New post 30 May 2011, 15:47
+1 E

Easy, but its lenght makes it difficult.
_________________

"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

My Integrated Reasoning Logbook / Diary: http://gmatclub.com/forum/my-ir-logbook-diary-133264.html

GMAT Club Premium Membership - big benefits and savings

Kudos [?]: 1103 [0], given: 109

Manager
Manager
avatar
Joined: 07 Mar 2011
Posts: 68

Kudos [?]: 15 [0], given: 1

Location: Canada
Concentration: Entrepreneurship, Finance
Schools: Chicago (Booth) - Class of 2014
GMAT 1: 710 Q50 V36
GPA: 3.3
WE: Other (Other)
Re: Finding of a survey of Systems magazine subscribers: Thirty [#permalink]

Show Tags

New post 31 May 2011, 05:04
E but took 2+ minute to complete.
_________________

Sent from my Slapchop

Kudos [?]: 15 [0], given: 1

Manager
Manager
User avatar
B
Joined: 11 Jul 2009
Posts: 165

Kudos [?]: 58 [0], given: 79

WE: Design (Computer Software)
GMAT ToolKit User
Re: Finding of a survey of Systems magazine subscribers: Thirty [#permalink]

Show Tags

New post 31 Jul 2011, 06:00
E....
_________________

Kaustubh

Kudos [?]: 58 [0], given: 79

3 KUDOS received
Manager
Manager
avatar
Joined: 19 Oct 2011
Posts: 82

Kudos [?]: 95 [3], given: 1

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

Show Tags

New post 26 Oct 2011, 15:55
3
This post received
KUDOS
29
This post was
BOOKMARKED
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.

Kudos [?]: 95 [3], given: 1

Manager
Manager
avatar
Joined: 19 Oct 2011
Posts: 82

Kudos [?]: 95 [0], given: 1

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

Show Tags

New post 26 Oct 2011, 18:09
Can anyone explain it? I kind of get lost when reading the question. Complex...
why E is right? I chose C instead.

Kudos [?]: 95 [0], given: 1

7 KUDOS received
Intern
Intern
avatar
Joined: 27 Jan 2011
Posts: 29

Kudos [?]: 9 [7], given: 0

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

Show Tags

New post 27 Oct 2011, 11:15
7
This post received
KUDOS
1
This post was
BOOKMARKED
miaojunmaggie wrote:
Can anyone explain it? I kind of get lost when reading the question. Complex...
why E is right? I chose C instead.


Let's assume
1. A total of 100 merchandise orders were placed last year by the subscribers in response to the advertisement.
2. A total of 200 merchandise orders were received by Systems in response to the advertisement (place by non-subscribers, or in the survey's terminology - people)

Therefore, total non-subscriber (people) orders = 100

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

Since, From stimulus: Most of the merchandise orders
placed in response to advertisements in Systems last year were placed by people under age thirty-five
,

Subscribers + Non-subscribers (people) less than 35 years old = 101 and above

Hence, the OA is "E"

Kudos [?]: 9 [7], given: 0

Manager
Manager
avatar
Joined: 19 Oct 2011
Posts: 82

Kudos [?]: 95 [0], given: 1

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

Show Tags

New post 27 Oct 2011, 13:24
Haha, I understand why C is wrong now. It says most of the merchandise orders are placed by people over 35, and it contradicts with the stimulus which says most of the orders placed are by people under 35.

It demonstrates how important reading comprehension is in critical reasoning. :)

Kudos [?]: 95 [0], given: 1

1 KUDOS received
Senior Manager
Senior Manager
User avatar
Status: MBAing!!!!
Joined: 24 Jun 2011
Posts: 287

Kudos [?]: 52 [1], given: 56

Location: United States (FL)
Concentration: Finance, Real Estate
GPA: 3.65
WE: Project Management (Real Estate)
Re: Finding of a survey of Systems magazine subscribers: Thirty [#permalink]

Show Tags

New post 27 Oct 2011, 15:27
1
This post received
KUDOS
2
This post was
BOOKMARKED
I picked E...by POE it's very hard to understand the argument....I like gummybear explanation

Premise 1: Subscribers...... 35 years old or younger...... accounted for 30% of the orders
Premise 2: 35 years old or younger..... accounted for most of the orders
Therefore many orders were placed by non subscribers.

Kudos [?]: 52 [1], given: 56

VP
VP
avatar
S
Joined: 09 Jun 2010
Posts: 1403

Kudos [?]: 158 [0], given: 916

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

Show Tags

New post 03 Nov 2011, 01:51
it is hard to understand argument. I do not see the similar questions in OG and gmatprep or from other sources. Anyone see the similar questions.

Kudos [?]: 158 [0], given: 916

Manager
Manager
User avatar
Joined: 29 Jun 2011
Posts: 159

Kudos [?]: 24 [0], given: 29

WE 1: Information Technology(Retail)
Re: Finding of a survey of Systems magazine subscribers: Thirty [#permalink]

Show Tags

New post 03 Nov 2011, 02:13
Tough one!!
I found it a bit confusing.Chose B first but now understand why it is E after reading gummybear's explanation.

E is correct.

Kudos [?]: 24 [0], given: 29

Re: Finding of a survey of Systems magazine subscribers: Thirty   [#permalink] 03 Nov 2011, 02:13

Go to page   Previous    1   2   3   4   5    Next  [ 87 posts ] 

Display posts from previous: Sort by

Finding of a survey of Systems magazine subscribers: Thirty

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.