Last visit was: 19 Nov 2025, 00:16 It is currently 19 Nov 2025, 00:16
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.
Close
Request Expert Reply
Confirm Cancel
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 19 Nov 2025
Posts: 105,379
Own Kudos:
Given Kudos: 99,977
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 105,379
Kudos: 778,147
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
VibhuAnurag
Joined: 29 Aug 2016
Last visit: 09 Nov 2025
Posts: 115
Own Kudos:
229
 [2]
Given Kudos: 6
Posts: 115
Kudos: 229
 [2]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
mmshake
Joined: 29 May 2023
Last visit: 01 Jul 2025
Posts: 5
Given Kudos: 5
Posts: 5
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Ro.O
Joined: 10 Oct 2023
Last visit: 15 Dec 2024
Posts: 2
Own Kudos:
3
 [3]
Given Kudos: 9
Posts: 2
Kudos: 3
 [3]
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
mmshake
VibhuAnurag
The answer is (B).

a = 1.2b
--> (a - b)/(a + b) = 0.2b/2.2b = 1/11

Hi!
Could you please elaborate on how you landed on 0.2/2.2b?
Thanks

Posted from my mobile device

He substituted a = 1.2b from the first formula in a in the second.
So: (a - b) -> (1.2b - b) = 0.2b and (a + b) -> (1.2b + b) = 2.2b resulting in 0.2b/2.2b
User avatar
Moulio
Joined: 09 Aug 2023
Last visit: 06 Mar 2024
Posts: 1
Own Kudos:
6
 [1]
Given Kudos: 4
Location: France
Concentration: International Business, Marketing
WE:Marketing (Telecommunications)
Products:
Posts: 1
Kudos: 6
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Much easier : 1.2 = 6*0.2 = 6/5 then a can be 6 and b 5. Then (6-5) / (6+5) = 1/11
Moderators:
Math Expert
105379 posts
Tuck School Moderator
805 posts