Last visit was: 19 Jul 2025, 20:17 It is currently 19 Jul 2025, 20:17
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 Jul 2025
Posts: 102,627
Own Kudos:
Given Kudos: 98,235
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 102,627
Kudos: 742,807
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Aakanshaaa
Joined: 10 Aug 2024
Last visit: 01 Jun 2025
Posts: 3
Own Kudos:
Given Kudos: 46
Posts: 3
Kudos: 1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Cana1766
Joined: 26 May 2024
Last visit: 17 Jul 2025
Posts: 80
Own Kudos:
Given Kudos: 7
Location: India
Products:
Posts: 80
Kudos: 69
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
MegB07
Joined: 15 Sep 2022
Last visit: 19 Jun 2025
Posts: 6
Given Kudos: 26
Location: India
Posts: 6
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I did not quite understand the solution. I dont understand why we are doing 0.5(1-x) here.
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 19 Jul 2025
Posts: 102,627
Own Kudos:
Given Kudos: 98,235
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 102,627
Kudos: 742,807
Kudos
Add Kudos
Bookmarks
Bookmark this Post
MegB07
I did not quite understand the solution. I dont understand why we are doing 0.5(1-x) here.

x is the fraction of the 1-liter solution that's replaced. So, (1 - x) liters stay, and since it's 50% alcohol, the remaining alcohol is 0.5(1 - x).

Check the discussion for alternative solutions.
User avatar
dradi123
Joined: 25 Aug 2020
Last visit: 15 Jul 2025
Posts: 39
Given Kudos: 5
GPA: 3.24
Products:
Posts: 39
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I like the solution - it’s helpful.
User avatar
dradi123
Joined: 25 Aug 2020
Last visit: 15 Jul 2025
Posts: 39
Given Kudos: 5
GPA: 3.24
Products:
Posts: 39
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I like the solution - it’s helpful.
User avatar
kuralnidhi
Joined: 12 Jun 2025
Last visit: 19 Jul 2025
Posts: 1
Given Kudos: 23
Posts: 1
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I like the solution - it’s helpful. very well explained
User avatar
anju2025
Joined: 01 Jun 2025
Last visit: 17 Jul 2025
Posts: 1
Given Kudos: 8
Products:
Posts: 1
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I like the solution - it’s helpful.
   1   2 
Moderators:
Math Expert
102627 posts
Founder
41115 posts