Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 09 Dec 2013, 02:00

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# population ratio - ETS Paper Test

Author Message
TAGS:
Senior Manager
Joined: 19 Nov 2009
Posts: 334
Followers: 4

Kudos [?]: 48 [0], given: 44

population ratio - ETS Paper Test [#permalink]  05 May 2010, 12:56
00:00

Difficulty:

5% (low)

Question Stats:

84% (01:23) correct 15% (00:32) wrong based on 19 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

Manager
Joined: 02 Aug 2009
Posts: 112
Followers: 2

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

Re: population ratio - ETS Paper Test [#permalink]  05 May 2010, 13:25
1
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
Joined: 23 Sep 2009
Posts: 157
Followers: 1

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

Re: population ratio - ETS Paper Test [#permalink]  05 May 2010, 21:28
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

_________________

Thanks,
VP

Senior Manager
Joined: 19 Nov 2009
Posts: 334
Followers: 4

Kudos [?]: 48 [0], given: 44

Re: population ratio - ETS Paper Test [#permalink]  06 May 2010, 10:20
thanks for the explanation !

This was a simple one... but i messed it up and got the answer as "1 to 4"
Senior Manager
Affiliations: SPG
Joined: 15 Nov 2006
Posts: 326
Followers: 10

Kudos [?]: 201 [0], given: 20

Re: population ratio - ETS Paper Test [#permalink]  19 May 2010, 19:43
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, 19:43
Similar topics Replies Last post
Similar
Topics:
ets paper tests 4 26 Aug 2004, 14:01
Help on ETS paper tests 7 21 Feb 2005, 23:24
ETS paper tests ? 3 22 Apr 2005, 20:13
ETS PAper tests. 4 24 Jul 2005, 00:54
ETS Paper Gmat tests 1 28 Jul 2005, 11:12
Display posts from previous: Sort by