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

It is currently 21 Oct 2014, 13:52

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

OG PS - 196

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
2 KUDOS received
Senior Manager
Senior Manager
User avatar
Joined: 25 Nov 2006
Posts: 337
Schools: St Gallen, Cambridge, HEC Montreal
Followers: 2

Kudos [?]: 27 [2] , given: 0

OG PS - 196 [#permalink] New post 19 Jun 2007, 10:29
2
This post received
KUDOS
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Hello,

Can someone please help me with question OG PS - 196?

The ratio, by volume, of soap to alcohol to water in a certain solution is 2:50:100. The solution will be altered so that the ratio of soap to alcohol is doubled while the ratio of soap to water is halved. If the altered solution will contain 100 cubic centimeters of alcohol, how many cubic centimeters of water will it contain

A - 50
B - 200
C - 400
D - 625
E - 800



Does anybody know the method to solve the problem?
2 KUDOS received
VP
VP
User avatar
Joined: 08 Jun 2005
Posts: 1156
Followers: 6

Kudos [?]: 118 [2] , given: 0

 [#permalink] New post 19 Jun 2007, 11:11
2
This post received
KUDOS
S2:A50:W100

S4:A50:W200 (the ratio S:A got bigger - S:W unchanged)

S4:A50:W400 (the ratio S:W got smaller - S:A unchanged)

100 cc of A

S8:A100:W800

the answer is (E)

:-D
Manager
Manager
avatar
Joined: 21 May 2007
Posts: 120
Followers: 1

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

 [#permalink] New post 19 Jun 2007, 11:14
Initial composition = 2:50:100
step 1: Double soap:alcohol ==> 4:50:100
step 2 :Halve soap:water ==> 4:50:400 (dont disturb soap:alcohol here. Just change water)

This solution has 100 cc of alcohol, and thus will have 800 cc of water.

NOTE:
The 2 steps may be done by initially halving alcohol and then changing water to get the required ratio.

best,
parsifal
  [#permalink] 19 Jun 2007, 11:14
    Similar topics Author Replies Last post
Similar
Topics:
196. seem to be sondenso 2 24 Feb 2008, 17:28
OG ps Ravshonbek 5 15 Aug 2007, 05:38
PS OG 244 mand-y 3 25 Nov 2005, 11:35
PS OG 424 mand-y 3 25 Nov 2005, 11:24
PS OG 424 mand-y 2 25 Nov 2005, 11:23
Display posts from previous: Sort by

OG PS - 196

  Question banks Downloads My Bookmarks Reviews Important topics  


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®.