Last visit was: 01 Sep 2026, 16:08 It is currently 01 Sep 2026, 16:08
Home
Messages
Tests
Schools
Events
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
User avatar
gmat_crack
User avatar
Joined: 22 Nov 2005
Last visit: 04 Aug 2009
Posts: 209
Own Kudos:
71
Posts: 209
Kudos: 71
DS - Gmat Prep Median Updated on: 07 Jul 2008, 20:57
Originally posted by gmat_crack on 13 Jun 2006, 21:14.
Last edited by gmat_crack on 07 Jul 2008, 20:57, edited 1 time in total.
Kudos
Add Kudos
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

(N/A)

Question Stats:

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

History

Date
Time
Result
Not Attempted Yet
Please explain the underneath concept.



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
giddi77
User avatar
Joined: 21 Sep 2003
Last visit: 02 Jan 2018
Posts: 526
Own Kudos:
257
Location: USA
Posts: 526
Kudos: 257
DS - Gmat Prep Median 13 Jun 2006, 21:38
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Interesting question. Looks like GMATPrep has infinite number of questions.

I. Lets pick the best case scenario:
8 houses have pirce equal to median price 130k
Their sum = 130k*8 = 1040k
Mean = 150k
Sum = 15*150k = 2250k
So rest of 7 houses should have average price = (2250k-1040k)/7 = 1210/7 = 172.xx k
Since the best case average of 7 houses is 172.xxk, atlease one of them should be > 165k

II. Not necessarily true. Consider the above example where 8 houses are 130k and 7 houses are 172.xxk, it is not true

III. Same example as above. Not necessarily true

Hence A.
User avatar
ps_dahiya
User avatar
Joined: 20 Nov 2005
Last visit: 15 Oct 2019
Posts: 1,486
Own Kudos:
1,255
Concentration: Strategy, Entrepreneurship
Schools:Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Posts: 1,486
Kudos: 1,255
DS - Gmat Prep Median 13 Jun 2006, 21:51
Kudos
Add Kudos
Bookmarks
Bookmark this Post
giddi77
Interesting question. Looks like GMATPrep has infinite number of questions.

I. Lets pick the best case scenario:
8 houses have pirce equal to median price 130k
Their sum = 130k*8 = 1040k
Mean = 150k
Sum = 15*150k = 2250k
So rest of 7 houses should have average price = (2250k-1040k)/7 = 1210/7 = 172.xx k
Since the best case average of 7 houses is 172.xxk, atlease one of them should be > 165k

II. Not necessarily true. Consider the above example where 8 houses are 130k and 7 houses are 172.xxk, it is not true

III. Same example as above. Not necessarily true

Hence A.
Show more


Bingo. I did in exactly same way.
User avatar
gmat_crack
User avatar
Joined: 22 Nov 2005
Last visit: 04 Aug 2009
Posts: 209
Own Kudos:
71
Posts: 209
Kudos: 71
DS - Gmat Prep Median 13 Jun 2006, 23:01
Kudos
Add Kudos
Bookmarks
Bookmark this Post
giddi77
Interesting question. Looks like GMATPrep has infinite number of questions.

I. Lets pick the best case scenario:
8 houses have pirce equal to median price 130k
Their sum = 130k*8 = 1040k
Mean = 150k
Sum = 15*150k = 2250k
So rest of 7 houses should have average price = (2250k-1040k)/7 = 1210/7 = 172.xx k
Since the best case average of 7 houses is 172.xxk, atlease one of them should be > 165k

II. Not necessarily true. Consider the above example where 8 houses are 130k and 7 houses are 172.xxk, it is not true

III. Same example as above. Not necessarily true

Hence A.
Show more


Girish you rock.
However, in exam pressure how should we approach?
User avatar
giddi77
User avatar
Joined: 21 Sep 2003
Last visit: 02 Jan 2018
Posts: 526
Own Kudos:
257
Location: USA
Posts: 526
Kudos: 257
DS - Gmat Prep Median 14 Jun 2006, 06:41
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmat_crack

However, in exam pressure how should we approach?
Show more


Well I am no Guru to give advise 'coz I get stumped by such questions too.

Of course it is difficult to solve such problems exhaustively on the test. But you need to also remember that most GMAT questions are based on the same concepts. The testmakers don't invent new porblems everyday; They just can't

For this question you can start with III. rd condition and eliminate it by taking an example of 8 houses being 130k. Try to use the same condition for 2nd and first.
Also you must have seen several problems based on the same concept - Given an average & median, to get the least value of numbers greater than the Median, we need to consider the case where all the numbers smaller than median are equal to the median itself. Believe me this is tested over an over. I can't be more precise because of the confidentiality agreement with GMAC.

Another trick would be to think in terms of smaller number of values. Say pick only 3 numbers. IN MOST CASES what is true of 3 or 5 numbers will be true of 15 or 21 numbers.



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
Moderator:
Bunuel
Math Expert
113017 posts