GMAT Changed on April 16th - Read about the latest changes here

 It is currently 23 Apr 2018, 06:23

### 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

# What is the quantity of milk in the solution?

Author Message
TAGS:

### Hide Tags

Intern
Joined: 12 Apr 2018
Posts: 4
What is the quantity of milk in the solution? [#permalink]

### Show Tags

Updated on: 13 Apr 2018, 00:03
In a milk solution of 10 lit, 2 lit of water is added thereby the concentration of milk is reduced by 15%. What is the quantity of milk in the solution?

I tried:

Concentration - Water added - Milk:

100 - 0 - 10 liter

85 - 0 - ?

$$\frac {85\times10}{100} = 8.5$$

But Answer is 9 litres. Please tell how to solve this problem?

Originally posted by kingston123 on 12 Apr 2018, 09:21.
Last edited by kingston123 on 13 Apr 2018, 00:03, edited 1 time in total.
Senior Manager
Joined: 30 Jan 2016
Posts: 498
Location: United States (MA)
Re: What is the quantity of milk in the solution? [#permalink]

### Show Tags

12 Apr 2018, 23:50
1
KUDOS
Milk_____x_______0_______x
Water___10-x_____2_______12-x
Total_____10______2_______12

So, the initial concentration of milk is $$\frac{x}{10}$$. It is $$\frac{15}{100}$$ more than the new concentration $$\frac{x}{12}$$ => $$\frac{x}{10}$$- $$\frac{15}{100}$$ = $$\frac{x}{12}$$. Solving this equation x equals 9 liters

Hope this helps!
_________________

Re: What is the quantity of milk in the solution?   [#permalink] 12 Apr 2018, 23:50
Display posts from previous: Sort by