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

It is currently 24 Jul 2014, 07:37

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

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

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 22 Feb 2004
Posts: 350
Followers: 1

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

GMAT Tests User
Committee X and Committee Y, which have no common members, [#permalink] New post 25 Jul 2004, 15:27
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
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

I missed it while taking the test and though solved it afterwards, i thought of sharing it with you guys.
Senior Manager
Senior Manager
avatar
Joined: 25 Jul 2004
Posts: 274
Followers: 1

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

GMAT Tests User
 [#permalink] New post 25 Jul 2004, 17:06
I would intuitivly say C, if both groups were of equal size, the mean of the combined group would be the midpoint between the means of the two groups. Since the mean of the thirdgroup is not, which ever mean its biased towards is the group with more members, and hence you can sufficiently answer the question.
Manager
Manager
avatar
Joined: 16 May 2004
Posts: 65
Location: columbus
Followers: 1

Kudos [?]: 4 [0], given: 0

 [#permalink] New post 25 Jul 2004, 17:24
good thinking SigEpUCI. you can arrive at the same answer the old fashioned way if you use algebra

(25.7 * X + 29.3* Y )/ X + Y = 26.6

solving for x and y we get Y = X/3

hence C is the ans
Senior Manager
Senior Manager
avatar
Joined: 22 Feb 2004
Posts: 350
Followers: 1

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

GMAT Tests User
 [#permalink] New post 25 Jul 2004, 19:48
Yes OA is C. It was last/second last question of PS section test. Generally some of the last 5 questions could be tricky.. now since i try to slove each question in one minute..this one was certainly not one of those. it required minimum of 1.5 min of thinking ( that's the reason that in old tests 30 min were given for 20 " easy" PS questions.. most of those questions could be done in 1 min by students nowadays.but i think these 2-3 tricky types used to take some time of from our earlier gmat taker friends
I also applied my silly " intution" but concluded that mean of ages had nothing to do with number of students.and selected E. Aftwerwards I applied algebra , as samandilika has done, and got the answer. But SigEpUCI has given a very good insight to this problem.
Here I would like to note that many a times, most of us are obsessed with always looking for very tough problems to practice as they seem to take us to that celeberated 50 scaled score. But , i think key to a good score lies in doing these oridnary questions correctly without falling in their traps. In the test we are not going to get more than 2-3 very difficult questions..but we will be getting lot of such types. So my two cents.. use gmat+ and OG as a bible ..even for maths.
  [#permalink] 25 Jul 2004, 19:48
    Similar topics Author Replies Last post
Similar
Topics:
4 Experts publish their posts in the topic Committee X and Committee Y , which have no common members sunland 13 01 Jul 2010, 04:57
Committee X and Committee Y, which have no common members, cipher 5 12 Aug 2009, 00:05
Committee X and Committee Y, which have no common members, milind1979 5 28 Apr 2009, 00:56
1 Committee X and Committee Y, which have no common members, Hermione 5 24 Oct 2006, 07:12
Committee X and Committee Y , which have no common members, joemama142000 4 21 Nov 2005, 15:11
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®.