GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 18 Nov 2018, 21:13

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 in November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
  • How to QUICKLY Solve GMAT Questions - GMAT Club Chat

     November 20, 2018

     November 20, 2018

     09:00 AM PST

     10:00 AM PST

    The reward for signing up with the registration form and attending the chat is: 6 free examPAL quizzes to practice your new skills after the chat.
  • The winning strategy for 700+ on the GMAT

     November 20, 2018

     November 20, 2018

     06:00 PM EST

     07:00 PM EST

    What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.

According to a recent census, West Egg had more mansions per ca-pita

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

Hide Tags

Retired Moderator
User avatar
Status: Getting strong now, I'm so strong now!!!
Affiliations: National Institute of Technology, Durgapur
Joined: 04 Jun 2013
Posts: 448
Location: India
GPA: 3.32
WE: Information Technology (Computer Software)
GMAT ToolKit User Premium Member Reviews Badge
According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post Updated on: 02 May 2018, 20:30
4
19
00:00
A
B
C
D
E

Difficulty:

  85% (hard)

Question Stats:

48% (01:16) correct 52% (01:11) wrong based on 695 sessions

HideShow timer Statistics

According to a recent census, West Egg had more mansions per ca-pita last year than East Egg, while East Egg had slightly fewer residents than West Egg. Since the census, West Egg and East Egg have each seen the demolition of a dozen dilapidated mansions within their respective borders, and no new mansions have begun construction. It must be true, therefore, that _________.

Which of the following best completes the passage?

A) West Egg and East Egg both have more cared-for mansions than dilapidated mansions.
B) West Egg has more mansions than East Egg.
C) West Egg has more mansions per capita than East Egg.
D) West Egg and East Egg have the same number of mansions.
E) West Egg has more residents than East Egg

Originally posted by WaterFlowsUp on 05 Jul 2015, 01:17.
Last edited by Bunuel on 02 May 2018, 20:30, edited 1 time in total.
Renamed the topic and edited the question.
Most Helpful Expert Reply
Math Expert
User avatar
V
Joined: 02 Aug 2009
Posts: 7037
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 30 Jan 2016, 07:56
3
2
RAHKARP27071989 wrote:
Hi chetan2u / daagh,

I am stuck between B and C.
OA is B.
Can you please assist why is C incorrect.


Hi,

OA is B, since it can be said with surety that the number of mansions are higher in west egg than east egg..

we are given last year per capita mansions was more in west egg and also the population was more in west egg..
so the number of mansions in west egg= number per capita * popualtion will be greater as both number per capita and popualtion is higher in west egg than east egg..
This year only 12 mansions have been demolished and new constructed, so this year too number of mansions will be higher in west egg than east egg

But can we say the same about C..
C talks of mansions per capita, which is dependent on number of mansions and population...
we know the changes in number of mansions, but nothing about population..
the population too if unchanged will give you an answer YES for C,
But if the population has increased in west and decreased in east, the answer can be NO..

so E need not be true, as we are not told anything about change in population..
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


GMAT online Tutor

Most Helpful Community Reply
Retired Moderator
User avatar
Status: Getting strong now, I'm so strong now!!!
Affiliations: National Institute of Technology, Durgapur
Joined: 04 Jun 2013
Posts: 448
Location: India
GPA: 3.32
WE: Information Technology (Computer Software)
GMAT ToolKit User Premium Member Reviews Badge
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 05 Jul 2015, 01:20
6
west Egg: Let's say
Before demolition # of houses =20
# of resident = 10
Per capita =2

Eas egg
# of houses=17
# of people=9
per-capita= 1.95

after demolotion of a dozenmansion

WEST egg
# of houses= 8
east egg
# of houses= 5

Therefore B can be inferred
General Discussion
Intern
Intern
avatar
Joined: 06 Apr 2015
Posts: 35
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 05 Jul 2015, 21:41
Shouldn't 'C' also be the right answer here,

Per Capita for west:
8/10 = 0.8

Per Capita for East:
5/9 = 0.55

0.8 > 0.55

I picked C and I'm still not sure why this isn't the right answer.


WaterFlowsUp wrote:
west Egg: Let's say
Before demolition # of houses =20
# of resident = 10
Per capita =2

Eas egg
# of houses=17
# of people=9
per-capita= 1.95

after demolotion of a dozenmansion

WEST egg
# of houses= 8
east egg
# of houses= 5

Therefore B can be inferred
Manager
Manager
User avatar
Joined: 24 Apr 2014
Posts: 101
Location: India
Concentration: Strategy, Operations
GMAT 1: 730 Q50 V38
GMAT 2: 750 Q48 V45
GPA: 4
WE: Information Technology (Computer Software)
Reviews Badge
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 06 Jul 2015, 02:33
WaterFlowsUp wrote:
According to a recent census, West Egg had more mansions per ca-pita last year than East Egg, while East Egg had slightly fewer residents than West Egg. Since the census, West Egg and East Egg have each seen the demolition of a dozen dilapidated mansions within their respective borders, and no new mansions have begun construction. It must be true, therefore, that _________.

Which of the following best completes the passage?

A) West Egg and East Egg both have more cared-for mansions than dilapidated mansions.
B) West Egg has more mansions than East Egg.
C) West Egg has more mansions per capita than East Egg.
D) West Egg and East Egg have the same number of mansions.
E) West Egg has more residents than East Egg




My Approach to solve this one is .......

1) West egg more mentions per capita than East engg (number of mansions / total population )
2) East engg has slightly fewer residents (assume equal) to West engg .

Now from these points you can infer that West has more mansions than East has .

Also this point says , demolition has equal impact on both east and west mansions ....this tells number of mensions reduced in east is equal to that of west .
So we can say that west still has more mansions than east has .
_________________

way to victory .....

Current Student
avatar
Joined: 14 Sep 2013
Posts: 79
Location: India
Concentration: Technology, General Management
GMAT 1: 540 Q48 V17
GMAT 2: 630 Q49 V27
GMAT 3: 720 Q49 V39
WE: Information Technology (Computer Software)
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 02 Aug 2015, 10:55
1
Why is E wrong?

In must be true question rephrasing premise is also a correct answer
Manager
Manager
avatar
B
Joined: 14 Jul 2014
Posts: 177
Location: United States
Schools: Duke '20 (D)
GMAT 1: 600 Q48 V27
GMAT 2: 720 Q50 V37
GPA: 3.2
Reviews Badge
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 28 Jan 2016, 14:41
picked E. I can see how B can possibly be correct but E is not incorrect.
Manager
Manager
User avatar
Joined: 12 Jan 2015
Posts: 200
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 29 Jan 2016, 04:51
Hi chetan2u / daagh,

I am stuck between B and C.
OA is B.
Can you please assist why is C incorrect.
_________________

Thanks and Regards,
Prakhar

Math Expert
User avatar
V
Joined: 02 Aug 2009
Posts: 7037
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 30 Jan 2016, 09:16
1
dina98 wrote:
picked E. I can see how B can possibly be correct but E is not incorrect.



Hi,
E is incorrect because we are not told anything about the change in population

if the population has increased in west and decreased in east, YES..
But if the population has decreased in west and increased in east, NO..

We cannot assume that the relative value of last year are true for this year unless specified
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


GMAT online Tutor

Intern
Intern
avatar
Joined: 28 Jun 2015
Posts: 27
Location: United States
GMAT 1: 610 Q49 V27
GPA: 2.5
WE: Project Management (Telecommunications)
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 31 Jan 2016, 08:41
Hey Guys
Look at these two sentences:
West Egg had more mansions per ca-pita last year than East Egg, while East Egg had slightly fewer residents than West Egg.
Pay attention to "slightly" which means:
West Egg mansion per capita * residents > East Egg mansion percapita* residents
And both West Egg and East Egg will demolite same amount of mansions, so still, West Egg mansions are more than East Egg.
Intern
Intern
avatar
B
Joined: 15 Dec 2013
Posts: 6
Concentration: Healthcare
GPA: 3.01
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 10 Feb 2018, 05:54
As per chetan2u 's logic,nothing can be assumed about the change in population, as it could have increased or decreased. This is the reason why E is incorrect and why C is uncertain.

C talks about mansion per capita = Total mansion/Total population. Since, this option is dependent on population and we are uncertain about fluctuation in population between the two points, C is uncertain.

However, going by the same logic, B is also uncertain. B talks about number of mansions, which product of mansions per capita & total population. Since the answer is dependent on total population and following the logic that you stated for C and E, their is a possibility that population of West Egg has declined extremely drastically and is now way less than East Egg. In that scenario, the number of mansions will be less in West Egg then East Egg.
If we are using the logic that we cannot assume population increase or decrease and ruling out option E and C, we should apply the same logic to A.
Math Expert
User avatar
V
Joined: 02 Aug 2009
Posts: 7037
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 10 Feb 2018, 06:05
sonaxi wrote:
As per chetan2u 's logic,nothing can be assumed about the change in population, as it could have increased or decreased. This is the reason why E is incorrect and why C is uncertain.

C talks about mansion per capita = Total mansion/Total population. Since, this option is dependent on population and we are uncertain about fluctuation in population between the two points, C is uncertain.

However, going by the same logic, B is also uncertain. B talks about number of mansions, which product of mansions per capita & total population. Since the answer is dependent on total population and following the logic that you stated for C and E, their is a possibility that population of West Egg has declined extremely drastically and is now way less than East Egg. In that scenario, the number of mansions will be less in West Egg then East Egg.
If we are using the logic that we cannot assume population increase or decrease and ruling out option E and C, we should apply the same logic to A.


Hi sonaxi..
You are correct that the mansions are dependent on population and per capita..
So let's see what was the case before demolition..
W had more mansions per capita and more population too last year..
So ofcourse more mansions per capita and more population MEANS more mansions last year..

Now what has happened since last year..
Same number of mansions are demolished. So same number being taken out, the larger number will remain larger..
So We has more mansions than E..
B should be true and certain
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


GMAT online Tutor

Manager
Manager
avatar
S
Joined: 24 Sep 2018
Posts: 137
CAT Tests
Re: According to a recent census, West Egg had more mansions per ca-pita  [#permalink]

Show Tags

New post 22 Oct 2018, 11:32
1
Veritas Prep Official Explanation:

The question reveals that West Egg had more mansions per capita and East Egg had fewer people. But “since the census” all we know is that both West Egg and East Egg have 12 fewer dilapidated mansions. We can conclude only that the total number of mansions in both places has decreased equally, and therefore West Egg must still have more mansions than East Egg. We do not have any information about the residents after the census. It’s possible East Egg’s population has increased dramatically, or that West Egg’s has decreased. We therefore cannot make any conclusions “per capita.”
_________________

Please award :thumbup: kudos, If this post helped you in someway. :student_man:

GMAT Club Bot
Re: According to a recent census, West Egg had more mansions per ca-pita &nbs [#permalink] 22 Oct 2018, 11:32
Display posts from previous: Sort by

According to a recent census, West Egg had more mansions per ca-pita

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


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.