It is currently 13 Dec 2017, 10:56

# Decision(s) Day!:

CHAT Rooms | Ross R1 | Kellogg R1 | Darden R1 | Tepper R1

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# John has 20 ounces of a 20% of salt solution. How much salt

Author Message
Director
Joined: 06 Sep 2006
Posts: 734

Kudos [?]: 49 [0], given: 0

John has 20 ounces of a 20% of salt solution. How much salt [#permalink]

### Show Tags

10 Oct 2006, 07:03
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

John has 20 ounces of a 20% of salt solution. How much salt should he add to make it a 25% solution?

Kudos [?]: 49 [0], given: 0

Manager
Joined: 01 Jun 2006
Posts: 139

Kudos [?]: 6 [0], given: 0

### Show Tags

10 Oct 2006, 07:22
Add a ounces more of salt, we got
(a+4)/(20+a)=1/4 => a=4/3
So 4/3 ounces more of salt pliz!

Kudos [?]: 6 [0], given: 0

Director
Joined: 23 Jun 2005
Posts: 838

Kudos [?]: 90 [0], given: 1

GMAT 1: 740 Q48 V42

### Show Tags

10 Oct 2006, 08:14
quangviet512 wrote:
Add a ounces more of salt, we got
(a+4)/(20+a)=1/4 => a=4/3
So 4/3 ounces more of salt pliz!

I have a doubt: is the volume supposed to increase or is it constant? If I had not seen your work, I'd have assumed that volume would remain at 20ounces.

Kudos [?]: 90 [0], given: 1

Senior Manager
Joined: 28 Aug 2006
Posts: 303

Kudos [?]: 174 [0], given: 0

### Show Tags

10 Oct 2006, 08:53
Obviously the volume will increase.
It must be 4/3 ounces.

I have explained a technique called alligation so that questions on mixtures like these can be answered fast...........

http://www.gmatclub.com/phpbb/viewtopic ... 676#251676
_________________

Kudos [?]: 174 [0], given: 0

Director
Joined: 23 Jun 2005
Posts: 838

Kudos [?]: 90 [0], given: 1

GMAT 1: 740 Q48 V42

### Show Tags

12 Oct 2006, 05:38
cicerone wrote:
Obviously the volume will increase.
It must be 4/3 ounces.

I have explained a technique called alligation so that questions on mixtures like these can be answered fast...........

http://www.gmatclub.com/phpbb/viewtopic ... 676#251676

Cicerone,
Can you please explain how you would apply the alligation technique for this problem? Thanks!

Kudos [?]: 90 [0], given: 1

Director
Joined: 23 Jun 2005
Posts: 838

Kudos [?]: 90 [0], given: 1

GMAT 1: 740 Q48 V42

### Show Tags

12 Oct 2006, 05:47
Just saw your explanation for this problem in the other thread. Thanks much, Cicerone!

Kudos [?]: 90 [0], given: 1

Senior Manager
Joined: 05 Oct 2006
Posts: 266

Kudos [?]: 22 [0], given: 0

### Show Tags

13 Oct 2006, 02:00

so (20+x)*25/100=20*20/100 + x
solving for x = 4/3

Kudos [?]: 22 [0], given: 0

Senior Manager
Joined: 30 Aug 2006
Posts: 373

Kudos [?]: 75 [0], given: 0

### Show Tags

13 Oct 2006, 12:21
Using the alligation technique cicerone so kindly informed us of :

20----------------------------100
--------------25-----------------
75------------------------------5

(20/75) * 5 = 20/15 = 4/3

Kudos [?]: 75 [0], given: 0

Intern
Joined: 24 Sep 2006
Posts: 10

Kudos [?]: [0], given: 0

### Show Tags

14 Oct 2006, 06:30
this is the best technique ever!!
thanks Ciceron
_________________

Almost there!

Kudos [?]: [0], given: 0

14 Oct 2006, 06:30
Display posts from previous: Sort by

# John has 20 ounces of a 20% of salt solution. How much salt

Moderator: chetan2u

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.