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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram [#permalink]

Show Tags

08 Nov 2010, 14:02

2

This post received KUDOS

11

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

45% (medium)

Question Stats:

73% (02:58) correct
27% (02:17) wrong based on 367 sessions

HideShow timer Statistics

Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?

Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram [#permalink]

Show Tags

09 Nov 2010, 00:01

1

This post received KUDOS

Answer:C Took time to solve this one, the statement 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid was confusing to me. After thinking more deeply, it was clear to me that new 2 kg of solution Y will also be 30% liquid X and 70% water, and then I was able to get the answer. That was a bit tricky and nice question. Kudos +1 for posting the question _________________

"I choose to rise after every fall" Target=770 http://challengemba.blogspot.com Kudos??

Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram [#permalink]

Show Tags

09 Nov 2010, 00:25

1

This post was BOOKMARKED

Initially you start with 8kg of solution which has 2.4kg of X and 5.6kg of water Post evaporation : 2.4kg of X and 3.6kg of water Now we add back 2kg of Y --> 1.4Kg water + 0.6Kg X So we have left 5Kg Water & 3Kg X

Percentage concentration is (3/5)*100 or 37.5% _________________

Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram [#permalink]

Show Tags

09 Nov 2010, 00:43

shrouded1 wrote:

Initially you start with 8kg of solution which has 2.4kg of X and 5.6kg of water Post evaporation : 2.4kg of X and 3.6kg of water Now we add back 2kg of Y --> 1.4Kg water + 0.6Kg X So we have left 5Kg Water & 3Kg X

Percentage concentration is (3/5)*100 or 37.5%

Yea, that's exactly how I solved but you know at first I was kinda adding 2 to 6 kg without considering liquid X and water's concentration within 2 kg being added. _________________

"I choose to rise after every fall" Target=770 http://challengemba.blogspot.com Kudos??

Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram [#permalink]

Show Tags

11 Dec 2011, 23:43

Initially we have 8kg of solution which has 3/10 0f 8= 2.4kg of X and 7/10 of 8 = 5.6kg of water after evaporation : 2.4kg of X and 3.6kg of water Now we added 2kg of solution Y --> 7/10 of 2=1.4Kg water + 3/10 0f 2 =0.6Kg X So we have left 5Kg Water & 3Kg X

Solution Y is 30% liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kg of solution Y and 2 kg of solution Y are added to the remaining 6 kg of liquid, what percent of this new solution is liquid X?

a. 30 b. 33 1/3 c. 37 1/2 d. 40 e. 50

What is the easiest way to approach this type of problem and solve under 2 min.

In 8 kilograms of solution Y there are 0.3*8=2.4 kilograms of solution X;

After 2 kilograms of water are replaced by 2 kilograms of solution Y, to the existing 2.4 kilograms of solution X, 0.3*2=0.6 kilograms of solution X are added, so in the new solution of 8 kilograms there are 2.4+0.6=3 kilograms of solution X, which is 3/8*100=37.5% of this new solution.

Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 [#permalink]

Show Tags

26 Aug 2013, 21:32

1

This post received KUDOS

rovshan85 wrote:

Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solution Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new solution is liquid X?

A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%

What is the easiest way to approach this type of problem and solve under 2 min.

1. The net effect of 2 kg of water evaporating and adding 2 kg of the solution is removing (-2 + 1.4 = -0.6) 0.6 kg of water and adding 0.6 kg of liquid 2 Therefore the changed solution contains, 2.4 + 0.6 = 3 kg of liquid and 5.6-0.6==5 kg of water. 3. Percentage of liquid is 3/8 * 100 % = 37 1/2 % _________________

Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram [#permalink]

Show Tags

28 Nov 2014, 06:24

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. _________________

Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram [#permalink]

Show Tags

04 Jan 2016, 12:21

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. _________________

Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram [#permalink]

Show Tags

05 Jan 2016, 05:55

Expert's post

1

This post was BOOKMARKED

rtaha2412 wrote:

Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?

A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%

The best way to solve these problems is to take one step at a time

Initial: 8 kg Solution Y This means Solution X = 2.4 kg, Water = 5.6 kg

Step 2: 2 kg of water is evaporated. Left over: Solution X = 2.4 kg and Water = 3.6 kg

Step 3: 2 kg of Solutoin Y is added Or, 0.6 kg of Solution X and 1.4 kg of water is added

Final: Solution X = 3, Water = 5 % of solution X = 3/8 * 100 = 37.5%

Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram [#permalink]

Show Tags

03 May 2016, 07:47

rtaha2412 wrote:

Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?

A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%

Hi,

I like using a table for mixture problems. This is what I came up with (see attachement):

Excellent posts dLo saw your blog too..!! Man .. you have got some writing skills. And Just to make an argument = You had such an amazing resume ; i am glad...

So Much $$$ Business school costs a lot. This is obvious, whether you are a full-ride scholarship student or are paying fully out-of-pocket. Aside from the (constantly rising)...