Register    Login    Search    Rss Feeds

Forums Home » Ask An Instructor » GMAT Math » General Math Questions


 Page 1 of 1 [ 3 posts ] 



  Print view Print view Previous topic Previous topic | Next topic Next topic
 

800 score math problem There are two sets A and B

Author Message
Guest
 Post subject: 800 score math problem There are two sets A and B
 Post Posted: Wed Apr 23, 2008 4:54 pm 
There are two sets A and B. Which set contains the maximum value?
(1) The range of A is bigger than that of B
(2) The Minimum value of A is bigger than of B

I got the answer C. Can anyone prove this C is wrong?
Top 
pt
 Post subject: 800 score math problem There are two sets A and B
 Post Posted: Sat Apr 26, 2008 4:18 pm 
Unless I am missing something here, C seems right.
Top 
RonPurewal
 Post subject:
 Post Posted: Tue Apr 29, 2008 6:35 am 
Offline
ManhattanGMAT Staff


Posts: 7146
nah, c is correct.

i'll assume that you know why each statement alone is insufficient, and cut directly to the chase.

take the statements together:
let Ma stand for the minimum of set a and Mb the minimum of set b. similarly, let Ra be the range of set a and Rb the range of set b.

then
(1) says Ra > Rb
(2) says Ma > Mb

note that the maximum of set a is Ma + Ra, and the maximum of set 2 is Mb + Rb (because that's what the range is: the distance between the max and min). but we know the former is bigger, by combining the inequalities contained in the 2 statements above.
Top 
Display posts from previous:  Sort by  
 
 Page 1 of 1 [ 3 posts ] 





Who is online

Users browsing this forum: No registered users and 1 guest

 
 

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: