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

It is currently 20 Sep 2014, 04:38

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

Each employee on a certain task force is either a manager or

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 25 Jul 2007
Posts: 16
Followers: 0

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

Each employee on a certain task force is either a manager or [#permalink] New post 27 Oct 2007, 10:33
Each employee on a certain task force is either a manager or a director. What percent of the employees on the task force are directors?

(1) The average (arithmetic mean) salary of the managers on the task force is $5000 less than the average salary of all employees on the task force.

(2) The average (arithmetic mean) salary of the directors on the task force is $15,000 greater than the average salary of all employees on the task force.

I've put way too much time into this and can't figure it out--thanks!
VP
VP
User avatar
Joined: 08 Jun 2005
Posts: 1157
Followers: 6

Kudos [?]: 114 [0], given: 0

GMAT Tests User
 [#permalink] New post 27 Oct 2007, 10:50
M = number of managers.
D = number of directors.
N = total employees.
X = average salary.

since:

NX = total salary

M(x-5000)+D(x+15000) = NX

MX-M5000+DX+D15000 = NX

and since:

M+D = N

then

MX+DX = NX

so:

-M5000+D15000 = 0

D15000 = M5000

3D = M

for every three directors you have one manager.

the answer is (C)

:)
  [#permalink] 27 Oct 2007, 10:50
    Similar topics Author Replies Last post
Similar
Topics:
Each employee on a certain task force is either a manager or lfox2 4 12 Nov 2006, 22:37
Each employee on a certain task force is either a manager or ffgmat 1 15 May 2006, 06:53
Each employee on a certain task force is either a manager or dinesh8 1 07 May 2006, 17:19
Each employee on a certain task force is either a manager or tank 7 20 Nov 2005, 00:23
Each employee on a certain task force is either a manager or Dan 8 22 Jul 2005, 22:07
Display posts from previous: Sort by

Each employee on a certain task force is either a manager or

  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®.