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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Committee X and Committee Y, which have no common members, [#permalink]

Show Tags

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

HideShow timer Statistics

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

I missed it while taking the test and though solved it afterwards, i thought of sharing it with you guys.

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.

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.