GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 21 Nov 2018, 06:24

# LBS is Calling R1 Admits - Join Chat Room to Catch the Latest Action

### 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 November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
• ### All GMAT Club Tests are Free and open on November 22nd in celebration of Thanksgiving Day!

November 22, 2018

November 22, 2018

10:00 PM PST

11:00 PM PST

Mark your calendars - All GMAT Club Tests are free and open November 22nd to celebrate Thanksgiving Day! Access will be available from 0:01 AM to 11:59 PM, Pacific Time (USA)
• ### Key Strategies to Master GMAT SC

November 24, 2018

November 24, 2018

07:00 AM PST

09:00 AM PST

Attend this webinar to learn how to leverage Meaning and Logic to solve the most challenging Sentence Correction Questions.

# If Adrian mixes 15 liters of saline solution A with 5 liters of a 40%

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

VP
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1316
Location: India
Concentration: International Business, Operations
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Consulting)
If Adrian mixes 15 liters of saline solution A with 5 liters of a 40%  [#permalink]

### Show Tags

29 Dec 2017, 08:58
00:00

Difficulty:

15% (low)

Question Stats:

81% (01:50) correct 19% (02:16) wrong based on 81 sessions

### HideShow timer Statistics

If Adrian mixes 15 liters of saline solution A with 5 liters of a 40% saline solution to get a 25% saline solution, what percent saline is solution A ?

a. 5
b. 10
c. 15
d. 20
e. 25

_________________

"Do not watch clock; Do what it does. KEEP GOING."

Manager
Joined: 23 May 2017
Posts: 242
Concentration: Finance, Accounting
WE: Programming (Energy and Utilities)
Re: If Adrian mixes 15 liters of saline solution A with 5 liters of a 40%  [#permalink]

### Show Tags

29 Dec 2017, 09:03
$$\frac{x}{100}$$* 15 + $$\frac{40}{100}$$* 5 = $$\frac{25}{100}$$ * 20

$$\frac{x}{100}$$ * 15 + 2 = 5

$$\frac{x}{100}$$ = $$\frac{3}{15}$$

x = 20 %
_________________

If you like the post, please award me Kudos!! It motivates me

Senior SC Moderator
Joined: 22 May 2016
Posts: 2117
If Adrian mixes 15 liters of saline solution A with 5 liters of a 40%  [#permalink]

### Show Tags

29 Dec 2017, 10:32
QZ wrote:
If Adrian mixes 15 liters of saline solution A with 5 liters of a 40% saline solution to get a 25% saline solution, what percent saline is solution A ?

a. 5
b. 10
c. 15
d. 20
e. 25

Let x/100 = unknown percent saline in solution A
% = percent saline in each solution

(% A)(Vol A) + (% B)(Vol B) = (% A+B)(Vol A+B)

$$\frac{x}{100}(15) + .40(5) = .25(15 + 5)$$

$$\frac{15}{100}x + 2 = 5$$

$$\frac{15}{100}x= 3$$

$$x = (3 * \frac{100}{15}) = 20$$

e-GMAT Representative
Joined: 04 Jan 2015
Posts: 2213
Re: If Adrian mixes 15 liters of saline solution A with 5 liters of a 40%  [#permalink]

### Show Tags

31 Dec 2017, 10:38
QZ wrote:
If Adrian mixes 15 liters of saline solution A with 5 liters of a 40% saline solution to get a 25% saline solution, what percent saline is solution A ?

a. 5
b. 10
c. 15
d. 20
e. 25

Ratio in which Solution A and Other solution was mixed = 15: 5 = 3: 1

Saline Concentration of Solution A = x

Saline Concentration of Other Solution = 40%

Overall Concentration = 25%

Using Alligation we can write -

(40-25): ( 25 - x) = 3: 1

15 = 75 - 3x

3x = 60

x = 20%

Correct Answer is Option D.

Regards,
Saquib
e-GMAT
Quant Expert
_________________

Number Properties | Algebra |Quant Workshop

Success Stories
Guillermo's Success Story | Carrie's Success Story

Ace GMAT quant
Articles and Question to reach Q51 | Question of the week

Number Properties – Even Odd | LCM GCD | Statistics-1 | Statistics-2
Word Problems – Percentage 1 | Percentage 2 | Time and Work 1 | Time and Work 2 | Time, Speed and Distance 1 | Time, Speed and Distance 2
Advanced Topics- Permutation and Combination 1 | Permutation and Combination 2 | Permutation and Combination 3 | Probability
Geometry- Triangles 1 | Triangles 2 | Triangles 3 | Common Mistakes in Geometry
Algebra- Wavy line | Inequalities

Practice Questions
Number Properties 1 | Number Properties 2 | Algebra 1 | Geometry | Prime Numbers | Absolute value equations | Sets

| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

VP
Joined: 07 Dec 2014
Posts: 1118
Re: If Adrian mixes 15 liters of saline solution A with 5 liters of a 40%  [#permalink]

### Show Tags

31 Dec 2017, 12:03
QZ wrote:
If Adrian mixes 15 liters of saline solution A with 5 liters of a 40% saline solution to get a 25% saline solution, what percent saline is solution A ?

a. 5
b. 10
c. 15
d. 20
e. 25

let x=saline % of A
15*x+5*.4=20*.25
x=1/5=20%
D
Re: If Adrian mixes 15 liters of saline solution A with 5 liters of a 40% &nbs [#permalink] 31 Dec 2017, 12:03
Display posts from previous: Sort by

# If Adrian mixes 15 liters of saline solution A with 5 liters of a 40%

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 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®.