GRE Prep 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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
A cleaning solution mixture
[#permalink]
05 Nov 2020, 11:21
05 Nov 2020, 11:21
00:00
Question Stats:
78% (01:56) correct
21% (01:27) wrong based on 23 sessions
Hide Show timer Statistics
A cleaning solution mixture calls for a ratio of 1 part bleach for every 4 parts water. When mixing the solution, Aki made a mistake and mixed in half as much bleach as was required by the ratio. The total solution consisted of 27 milliliters. How much bleach did Aki put into the solution, in milliliters?
(A) 3
(B) 4
(C) 6
(D) 7
(E) 8
(A) 3
(B) 4
(C) 6
(D) 7
(E) 8
Re: A cleaning solution mixture
[#permalink]
05 Nov 2020, 11:24
05 Nov 2020, 11:24
Expert Reply
The ratio 1 : 4, which can be re-expressed as 1x : 4x, was not followed. Instead of 1x ml of bleach, Aki used 0.5x ml of bleach.
0.5x + 4x = 27
4.5x = 27
x = 6
So, 0.5x = 0.5 * 6 = 3 ml of bleach was put in the solution.
A is the best
0.5x + 4x = 27
4.5x = 27
x = 6
So, 0.5x = 0.5 * 6 = 3 ml of bleach was put in the solution.
A is the best
Re: A cleaning solution mixture
[#permalink]
17 Nov 2020, 23:08
17 Nov 2020, 23:08
1
How I solved this:
Half as much of 1:4 is 1:(2*4) = 1:8
1 part ratio + 8 part of the ratio = 9 parts of the ratio
27parts total; 27/9=3
Each part was 3x the ratio itself. A
Half as much of 1:4 is 1:(2*4) = 1:8
1 part ratio + 8 part of the ratio = 9 parts of the ratio
27parts total; 27/9=3
Each part was 3x the ratio itself. A
