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

It is currently 30 Sep 2014, 22:17

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

m07 Q8

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
Joined: 13 Jan 2010
Posts: 23
Followers: 1

Kudos [?]: 5 [0], given: 10

m07 Q8 [#permalink] New post 02 Aug 2010, 04:56
Can someone help explain the solution? I seem to be having problems with mixtures. Would you have any recommendation on study material that I can use for the same?

If 12 ounces of a strong vinegar solution are diluted with 50 ounces of water to form a three-percent vinegar solution, what was the concentration of the original solution?

19.3%
17%
16.67%
15.5%
12.5%
1 KUDOS received
Intern
Intern
avatar
Joined: 23 Jun 2010
Posts: 37
Followers: 0

Kudos [?]: 13 [1] , given: 5

Re: m07 Q8 [#permalink] New post 02 Aug 2010, 15:39
1
This post received
KUDOS
I would approach the question in the following way:
1) The question reads 12oz of strong vinegar solution (we do not know what is the composition of the solution) is added to 50oz of water.
2) Thus we get 12oz + 50oz = 62oz of total solution.
3) The question asks what was the original concentration of the solution.
4) Now the amount of vinegar in the solution remains unchanged since we only added 50oz of water to dilute it to 3%. We use this information to calculate the total amount of vinegar currently present in the solution. i.e. 3% of 62oz = 1.8~
5) From step 3 we know the amount of vinegar is unchanged. That means there is 1.8~oz vinegar in 12oz.
6) Solving for "How many in 100oz" will give us the concentration. That is, (100 * 10)/(12 * 18) = 15.5%
Hope that helped.
(Don't forget to give Kudos if it did! :-D )
_________________

-DK
---------------------------------------------------------
If you like what you read then give a Kudos! :-)
Diagnostic Test: 620
The past is a guidepost, not a hitching post.
---------------------------------------------------------

Re: m07 Q8   [#permalink] 02 Aug 2010, 15:39
    Similar topics Author Replies Last post
Similar
Topics:
18 Experts publish their posts in the topic M07 #2 dczuchta 15 25 Sep 2008, 10:35
3 Experts publish their posts in the topic m07 q33 mbafwi 10 08 Sep 2008, 10:39
6 Experts publish their posts in the topic m07 #22 michael127 19 03 Sep 2008, 18:41
M07: Q25 tamg08 10 25 Aug 2008, 18:36
1 m07q18 abhaypratapsingh 16 23 Jul 2008, 04:58
Display posts from previous: Sort by

m07 Q8

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: Bunuel, WoundedTiger



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®.