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.
Nov 17Live Online Classes with Top GRE Expert Rich Zwelling
08:00 PM EST
-10:00 PM EST
Get live instruction from a top-scoring, industry-recognized GRE teachers + 6 months of access to TTP Self-Study included! Tues/Thur Sept 7, 2026---Feb. 2, 2027, 1:00pm-3:00pm EST
Dec 14Live Online Classes with Top GRE Expert Michael Butville
08:00 PM EST
-10:00 PM EST
Get live instruction from a top-scoring, industry-recognized GRE teachers + 6 months of access to TTP Self-Study included! Mon/Wed Dec. 14, 2026---Feb. 22, 2027, 8:00pm-10:00pm EST
A certain dog kennel houses only collies, labs, and golden
[#permalink]
14 Jun 2018, 14:20
14 Jun 2018, 14:20
Expert Reply
00:00
Question Stats:
86% (01:54) correct
13% (02:45) wrong based on 60 sessions
Hide Show timer Statistics
A certain dog kennel houses only collies, labs, and golden retrievers. If the ratio of collies to labs is 5 : 9, there are 66 golden retrievers, and 12 more golden retrievers than labs in the kennel, what percent of the dogs in the kennel are collies?
(A) 5%
(B) 9%
(C) 12%
(D) 20%
(E) 25%
(A) 5%
(B) 9%
(C) 12%
(D) 20%
(E) 25%
Re: A certain dog kennel houses only collies, labs, and golden
[#permalink]
15 Jun 2018, 07:54
15 Jun 2018, 07:54
3
1
Bookmarks
sandy wrote:
A certain dog kennel houses only collies, labs, and golden retrievers. If the ratio of collies to labs is 5 : 9, there are 66 golden retrievers, and 12 more golden retrievers than labs in the kennel, what percent of the dogs in the kennel are collies?
(A) 5%
(B) 9%
(C) 12%
(D) 20%
(E) 25%
(A) 5%
(B) 9%
(C) 12%
(D) 20%
(E) 25%
I took 3:34 secs for this question
collies : labs : golden retrievers => c:l:g
Given that c/l = 5x/9x --> eq 1
Given total g = 66 and now question say that golden retrievers are 12 more than labs i.e. l = 54.
From eq 1 , we can take 9x = 54, x = 6
then c = 30.
Now c/c+l+g = 30/150 => 0.2.
D.
Re: A certain dog kennel houses only collies, labs, and golden
[#permalink]
05 Jul 2018, 03:02
05 Jul 2018, 03:02
Expert Reply
1
Bookmarks
Explanation
Start by assigning variables:
C = Number of collies
L = Number of labs
G = Number of golden retrievers
According to the given information:
G = 66
L = 66 – 12
L = 54
Ratios work like fractions, and you can set them up accordingly:
\(\frac{5}{9}=\frac{C}{54}\)
Cross-multiplying and simplifying, you get:
C = 30
Now take the number of collies and express it as a percent of the total number of dogs:
Total # of Dogs = 30 + 54 + 66 = 150
\(\frac{30}{150}*100=20%\)
Start by assigning variables:
C = Number of collies
L = Number of labs
G = Number of golden retrievers
According to the given information:
G = 66
L = 66 – 12
L = 54
Ratios work like fractions, and you can set them up accordingly:
\(\frac{5}{9}=\frac{C}{54}\)
Cross-multiplying and simplifying, you get:
C = 30
Now take the number of collies and express it as a percent of the total number of dogs:
Total # of Dogs = 30 + 54 + 66 = 150
\(\frac{30}{150}*100=20%\)
