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

It is currently 18 May 2013, 09:48
Customize  |  Hide

Search
Register
New posts
Unanswered

The average score on a test taken by 10 students was X. If

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Current Student
User avatar
Joined: 03 Dec 2007
Posts: 85
Schools: NYU STERN
Followers: 3

Kudos [?]: 6 [0], given: 0

The average score on a test taken by 10 students was X. If [#permalink] New post 28 Dec 2008, 15:08
The average score on a test taken by 10 students was X. If the average score for 5 of the students was 8, what was the average score, in terms of x, for the remaining 5 students who took the test?

FYI - answer is 2x-8, but I am having a mental block right now!

THANKS!
1 KUDOS received
VP
VP
User avatar
Joined: 05 Jul 2008
Posts: 1442
Followers: 28

Kudos [?]: 152 [1] , given: 1

GMAT Tests User
Re: Average w/variables question [#permalink] New post 28 Dec 2008, 15:19
1
This post received
KUDOS
(X1 + X2 + X3 +.. X10) / 10 = X means (X1+X2+X3+.. +X10) = 10x

similarly (X1+X2+.. +X5) /5=8 means (X1+X2+.. +X5) =40

(X6 + .. X10) = 10x-40

Avg = 10x-40/5 = 2x-8
Current Student
User avatar
Joined: 03 Dec 2007
Posts: 85
Schools: NYU STERN
Followers: 3

Kudos [?]: 6 [0], given: 0

Re: Average w/variables question [#permalink] New post 28 Dec 2008, 15:38
Duh thanks! That wasn't hard but I just completely spaced out!

THANK YOU!
Re: Average w/variables question   [#permalink] 28 Dec 2008, 15:38
    Similar topics Author Replies Last post
Similar
Topics:
 New posts Mr. x has taken r test and has average of 80%. What must get Capthan 1 11 Mar 2008, 08:02
New posts 1 A students average (arithmetic mean) test score on 4 tests petercao 3 11 Nov 2008, 13:33
New posts A student s average (arithmetic mean) test score on 4 tests haichao 1 11 Nov 2008, 13:42
New posts A student s average (arithmetic mean) test score on 4 tests Jcpenny 1 11 Nov 2008, 13:56
New posts 2 EXPERTS_POSTS_IN_THIS_TOPIC A student's average (arithmetic mean) test score on 4 tests Bunuel 7 26 Aug 2012, 03:07
Display posts from previous: Sort by

The average score on a test taken by 10 students was X. If

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma

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