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

It is currently 03 Sep 2015, 15:35
GMAT Club Tests

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

Committee X and Committee Y , which have no common members,

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Director
Director
avatar
Joined: 17 Oct 2005
Posts: 938
Followers: 1

Kudos [?]: 89 [0], given: 0

Committee X and Committee Y , which have no common members, [#permalink] New post 21 Nov 2005, 15:11
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Committee X and Committee Y , which have no common members, will combine to form Committee Z . Does Committee X have more members than Committee Y ?

(1) The average (arithmetic mean) age of the members of Committee X is 25.7 years and the average age of the members of Committee Y is 29.3 years.

(2) The average (arithmetic mean) age of the members of Committee Z will be 26.6 years.
Director
Director
avatar
Joined: 21 Aug 2005
Posts: 793
Followers: 2

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

 [#permalink] New post 21 Nov 2005, 20:13
C

x be the members in X
y be the members in Y
x+y be members in Z
25.7x + 29.3y = 26.6(x+y).

From this, we can find the ratio of x and y or say which is greater.
Current Student
User avatar
Joined: 29 Jan 2005
Posts: 5240
Followers: 23

Kudos [?]: 208 [0], given: 0

 [#permalink] New post 22 Nov 2005, 10:26
Two equations for two unknowns. Together sufficient.

(C)
VP
VP
avatar
Joined: 22 Aug 2005
Posts: 1120
Location: CA
Followers: 1

Kudos [?]: 52 [0], given: 0

 [#permalink] New post 22 Nov 2005, 10:28
Very nice explanation qsr. Thanks.
_________________

Whether you think you can or think you can't. You're right! - Henry Ford (1863 - 1947)

SVP
SVP
User avatar
Joined: 05 Apr 2005
Posts: 1731
Followers: 5

Kudos [?]: 43 [0], given: 0

Re: Average, DS [#permalink] New post 22 Nov 2005, 21:53
this type of average question, we can find the answer by observation too. the average age of z is 26.6, which is close to the average age, 25.7, of x. so we can say that there are more member of people/members in x than the members in y.

so C is the answer.
Re: Average, DS   [#permalink] 22 Nov 2005, 21:53
Display posts from previous: Sort by

Committee X and Committee Y , which have no common members,

  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®.