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

It is currently 28 Jul 2014, 18:37

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

Help!

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
User avatar
Joined: 11 Apr 2013
Posts: 34
GMAT 1: 720 Q47 V42
GMAT 2: 770 Q48 V48
GPA: 3.49
WE: Military Officer (Military & Defense)
Followers: 0

Kudos [?]: 3 [0], given: 3

Help! [#permalink] New post 12 Jun 2013, 21:18
This problem single handedly screwed my quant section this week. I can't remember the exact numbers involved, but it was something like:

'n' parents split the $300 cost of a school trip equally. If the school had three less parents, each the parents would each pay an additional $3. Find 'n'

my method was...
300/n = x
300 = nx

and

300/n-3 = x +3
300 = nx + 3n - 3x - 9
sub nx = 300
300 = 300 + 3n - 3x - 9
9 = 3(n - x)
3 = n - x
.... then I don't know, not sure if I'm even doing this right. I think it was just jitters, but i spent 5 full minutes on this and finally just guessed.

My question is: what's the correct method here and has anyone seen a question similar to this so I can work it out with numbers that actually add up? This seems really easy but I'm just not getting something and it's driving me insane. Thanks!
_________________

:: My test experience ::
http://gmatclub.com/forum/540-to-720-a-debrief-154257.html

\sqrt{scott}

Intern
Intern
User avatar
Joined: 11 Apr 2013
Posts: 34
GMAT 1: 720 Q47 V42
GMAT 2: 770 Q48 V48
GPA: 3.49
WE: Military Officer (Military & Defense)
Followers: 0

Kudos [?]: 3 [0], given: 3

Re: Help! [#permalink] New post 18 Dec 2013, 06:58
bump - still not getting it
_________________

:: My test experience ::
http://gmatclub.com/forum/540-to-720-a-debrief-154257.html

\sqrt{scott}

1 KUDOS received
Director
Director
avatar
Status: Assisting candidates to get admit in to top global business schools
Affiliations: MBA
Joined: 12 May 2010
Posts: 633
Location: Bangalore
Schools: HEC, Paris
WE 1: 9 Years
Followers: 25

Kudos [?]: 76 [1] , given: 6

Re: Help! [#permalink] New post 21 Dec 2013, 01:44
1
This post received
KUDOS
Hi,

Approach is right.. some data is wrong as solving it is leading to irrational roots. To correct data, let n decreases by 5 and x increases by 5,
then we get 5 = n-x by your approach (instead of 3= n-x)

Next step is to put x= n-5 in the equation nx=300 , solve quadratic equation to get n = 20 and x =15

To know more about online GMAT classes visit http://bit.ly/XKxOPd

Feel free to write if you have any further queries.

Cheers!
Neha Singh
_________________

Best Wishes,
Neha Singh
GMAT Instructor & MBA Application Consultant
General Education- Empowering Intellect


Try GMAT Mini Diagnostic tool

Intern
Intern
User avatar
Joined: 11 Apr 2013
Posts: 34
GMAT 1: 720 Q47 V42
GMAT 2: 770 Q48 V48
GPA: 3.49
WE: Military Officer (Military & Defense)
Followers: 0

Kudos [?]: 3 [0], given: 3

Re: Help! [#permalink] New post 21 Dec 2013, 18:29
nehasingh1020 wrote:
Hi,

Approach is right.. some data is wrong as solving it is leading to irrational roots. To correct data, let n decreases by 5 and x increases by 5,
then we get 5 = n-x by your approach (instead of 3= n-x)

Next step is to put x= n-5 in the equation nx=300 , solve quadratic equation to get n = 20 and x =15

To know more about online GMAT classes visit http://bit.ly/XKxOPd

Feel free to write if you have any further queries.

Cheers!
Neha Singh


Thanks Neha!!! I think on the actual test the problem was that I wasn't resubbing after the first substitution in order to get a quadratic and solve that way. I'm used to two variable/two equation problems being a little more straightforward. Thanks for clarifying.
_________________

:: My test experience ::
http://gmatclub.com/forum/540-to-720-a-debrief-154257.html

\sqrt{scott}

Re: Help!   [#permalink] 21 Dec 2013, 18:29
    Similar topics Author Replies Last post
Similar
Topics:
Help! tonglin 8 20 Mar 2005, 19:43
HELP!!! Jesse 1 07 Mar 2005, 06:00
Help! Pimy 2 05 Dec 2004, 12:15
Help! mbahope 1 08 Oct 2004, 11:33
Help!! mohazad 0 18 Sep 2004, 21:51
Display posts from previous: Sort by

Help!

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: bagdbmba, WaterFlowsUp



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®.