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
OA D
Source: Princeton Review
If Adrian mixes 15 liters of saline solution A with 5 liters
This topic has expert replies
-
- Moderator
- Posts: 7187
- Joined: Thu Sep 07, 2017 4:43 pm
- Followed by:23 members
Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
GMAT/MBA Expert
- Scott@TargetTestPrep
- GMAT Instructor
- Posts: 7247
- Joined: Sat Apr 25, 2015 10:56 am
- Location: Los Angeles, CA
- Thanked: 43 times
- Followed by:29 members
Let solution A be an x% saline solution; we can create the equation:BTGmoderatorDC 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
OA D
Source: Princeton Review
15(x/100) + 5(0.4) = 0.25(15 + 5)
15x/100 + 2 = 5
15x/100 = 3
15x = 300
x = 20
Answer: D
Scott Woodbury-Stewart
Founder and CEO
[email protected]
See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews