Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 24 May 2013, 03:40
Customize  |  Hide

Search
Register
New posts
Unanswered

population ratio - ETS Paper Test

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Senior Manager
Senior Manager
User avatar
Joined: 19 Nov 2009
Posts: 337
Followers: 2

Kudos [?]: 47 [0], given: 44

GMAT Tests User
population ratio - ETS Paper Test [#permalink] New post 05 May 2010, 13:56
00:00

Question Stats:

82% (01:26) correct 17% (00:32) wrong based on 4 sessions
In a certain population, there are 3 times as many people aged twenty-one or under as there are people over twenty-one. The ratio of those twenty-one or under to the total population is

(A) 1 to 2
(B) 1 to 3
(C) 1 to 4
(D) 2 to 3
(E) 3 to 4

Pls. explain your answers.
1 KUDOS received
Manager
Manager
Joined: 02 Aug 2009
Posts: 112
Followers: 2

Kudos [?]: 9 [1] , given: 1

Re: population ratio - ETS Paper Test [#permalink] New post 05 May 2010, 14:25
1
This post received
KUDOS
just plug in #s

say there are 6 people aged under 21. Thus there will be 2 people over 21 so a total of 8 people. And we are asked what proportion under 21 (6) is to total (8)

6/8=3/4 =E

Additionally same exact approach 3X/3X+1X = 3/4
Manager
Manager
Joined: 23 Sep 2009
Posts: 159
Followers: 1

Kudos [?]: 9 [0], given: 37

Re: population ratio - ETS Paper Test [#permalink] New post 05 May 2010, 22:28
Consider the ratio of the under population of 21 to over the 21 as 3:1
therefore 3x:1X
Now the ratio of the under to the whole population becomes 3x/3x+1x
= 3/4

Answer is E)
_________________

Thanks,
VP

Senior Manager
Senior Manager
User avatar
Joined: 19 Nov 2009
Posts: 337
Followers: 2

Kudos [?]: 47 [0], given: 44

GMAT Tests User
Re: population ratio - ETS Paper Test [#permalink] New post 06 May 2010, 11:20
thanks for the explanation !

This was a simple one... but i messed it up and got the answer as "1 to 4" :(
Senior Manager
Senior Manager
User avatar
Affiliations: SPG
Joined: 15 Nov 2006
Posts: 327
Followers: 9

Kudos [?]: 180 [0], given: 19

GMAT Tests User
Re: population ratio - ETS Paper Test [#permalink] New post 19 May 2010, 20:43
is there a section for avoiding stupid mistakes ...i wrote down 1:1 ....completely forgot that it was thrice ..:(
Re: population ratio - ETS Paper Test   [#permalink] 19 May 2010, 20:43
    Similar topics Author Replies Last post
Similar
Topics:
 New posts ets paper tests damit 4 26 Aug 2004, 15:01
New posts Help on ETS paper tests mckenna 7 22 Feb 2005, 00:24
New posts ETS paper tests ? banerjeea_98 3 22 Apr 2005, 21:13
New posts ETS PAper tests. Dilshod 4 24 Jul 2005, 01:54
New posts ETS Paper Gmat tests kayser`soze 1 28 Jul 2005, 12:12
Display posts from previous: Sort by

population ratio - ETS Paper Test

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma, IanStewart

Search for:


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com