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 Your Progress
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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.
During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
20 Feb 2015, 02:04
2
10
00:00
A
B
C
D
E
Difficulty:
65% (hard)
Question Stats:
62% (02:19) correct 38% (02:12) wrong based on 220 sessions
HideShow timer Statistics
During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 10 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella‟s total per-gallon discount is what percent of Kim‟s total per-gallon discount?
Re: During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
20 Feb 2015, 03:01
2
Stardust Chris wrote:
During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 10 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella‟s total per-gallon discount is what percent of Kim‟s total per-gallon discount?
(A) 80%
(B) 100%
(C) 116.7%
(D) 120%
(E) 140%
Kim purchased 20 gallons of gas. She paid for 10 + 0.9*10 = 19 gallons, so the overall discount she got was 1/20 = 5%.
Isabella purchased 25 gallons of gas. She paid for 10 + 0.9*15 = 23.5 gallons, so the overall discount she got was 1.5/25 = 6%.
During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
20 Feb 2015, 21:48
2
1
Stardust Chris wrote:
During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 10 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella‟s total per-gallon discount is what percent of Kim‟s total per-gallon discount?
(A) 80%
(B) 100%
(C) 116.7%
(D) 120%
(E) 140%
hi, just take the discount to be 1 unit on every gallon above 10.. kim saved 10 on 20 gallons or\(\frac{1}{2}\)per gallon... isabella saved 15 on 25 gallons or \(\frac{15}{25}=\frac{3}{5}\)per gallon.. %=\(100*(\frac{3}{5})/(\frac{1}{2})=\frac{600}{5}=120%\)...ans B
_________________
Re: During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
15 Apr 2016, 01:35
Hi Bunuel,
Thanks for the explanation. A small clarification required though..
You have applied the specified discount on #Units of Gallons. Though it doesn't matter but I chose to look at the given discount in terms of Price/Gallon ($1/G) and then followed the same approach.
I usually take time on percent questions if they're of 700+ level. Do you see any obvious flaw in my approach? I could work on some particular concept files if you think that may help me provide a direct and efficient approach to percent problems. Accuracy is moderate on higher level percent question but time is of concern. This includes my accuracy on Manhattan CATS.
Hari
Bunuel wrote:
Stardust Chris wrote:
During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 10 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella‟s total per-gallon discount is what percent of Kim‟s total per-gallon discount?
(A) 80%
(B) 100%
(C) 116.7%
(D) 120%
(E) 140%
Kim purchased 20 gallons of gas. She paid for 10 + 0.9*10 = 19 gallons, so the overall discount she got was 1/20 = 5%.
Isabella purchased 25 gallons of gas. She paid for 10 + 0.9*15 = 23.5 gallons, so the overall discount she got was 1.5/25 = 6%.
During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
08 Mar 2017, 09:19
During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 10 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella’s total per-gallon discount is what percent of Kim’s total per-gallon discount?
Re: During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
08 Mar 2017, 09:32
SajjadAhmad wrote:
During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 10 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella’s total per-gallon discount is what percent of Kim’s total per-gallon discount?
(A) 80% (B) 100% (C) 116.7% (D) 120% (E) 140%
Please refer to the discussion above.
_________________
Concentration: General Management, Entrepreneurship
GPA: 3.8
WE: Engineering (Energy and Utilities)
Re: During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
23 Aug 2017, 02:37
Stardust Chris wrote:
During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 10 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella‟s total per-gallon discount is what percent of Kim‟s total per-gallon discount?
(A) 80%
(B) 100%
(C) 116.7%
(D) 120%
(E) 140%
Let R be the fixed rate of the gas per gallon. So for first 10 gallon, rate = 10 R
After this the gas will be available at 10 percent discount.
Kim purchased 20 gallon of gas. So, price = 10R +.9*10 R = 19R Discount per gallon = 1/20
Isabella purchased 25 gallons of gas. So, price = 10 R + .9*15 R = 22.5 R Discount per gallon = 1.5/25 = 3/50
So, percentage of Isabella‟s total per-gallon discount w.r.t Kim‟s total per-gallon discount = (3/50)/(1/20) *100 = 120%
Answer D _________________
CAT 2017 99th percentiler : VA 97.27 | DI-LR 96.84 | QA 98.04 | OA 98.95 UPSC Aspirants : Get my app UPSC Important News Reader from Play store.
Re: During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
25 Aug 2017, 10:07
Stardust Chris wrote:
During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 10 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella‟s total per-gallon discount is what percent of Kim‟s total per-gallon discount?
(A) 80%
(B) 100%
(C) 116.7%
(D) 120%
(E) 140%
Let’s assume that the price per gallon of gas is $10. Thus, the discounted price per gallon of gas after the first 10 gallons is 0.9 x 10 = $9. In other words, after the first 10 gallons, each additional gallon has a $1 discount in price.
Now let’s calculate the total discount for each person. Since Kim purchased 20 gallons of gas, the 10 additional gallons (that is, after the initial 10 gallons) will receive a $10 discount, so her total per-gallon discount is 10/20 = $0.50. Since Isabella purchased 25 gallons of gas, the 15 additional gallons (that is, after the initial 10 gallons) will receive a $15 discount, so her total per-gallon discount is 15/25 = $0.60. Therefore, Isabella’s total per-gallon discount is 0.60/0.50 = 6/5 = 1.2 = 120% of Kim’s total per-gallon discount.
Answer: D
_________________
Scott Woodbury-Stewart Founder and CEO
GMAT Quant Self-Study Course 500+ lessons 3000+ practice problems 800+ HD solutions
During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
26 Aug 2017, 08:16
shashankism wrote:
Stardust Chris wrote:
During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 10 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella‟s total per-gallon discount is what percent of Kim‟s total per-gallon discount?
(A) 80%
(B) 100%
(C) 116.7%
(D) 120%
(E) 140%
Let R be the fixed rate of the gas per gallon. So for first 10 gallon, rate = 10 R
After this the gas will be available at 10 percent discount.
Kim purchased 20 gallon of gas. So, price = 10R +.9*10 R = 19R Discount per gallon = 1/20
Isabella purchased 25 gallons of gas. So, price = 10 R + .9*15 R = 22.5 R Discount per gallon = 1.5/25 = 3/50
So, percentage of Isabella‟s total per-gallon discount w.r.t Kim‟s total per-gallon discount = (3/50)/(1/20) *100 = 120%
Answer D
I think you made a typo error in the highlighted portion, It should be 23.5 R
During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
07 Sep 2017, 19:50
Let the cost of fuel be $10 per gallon. Kim First, 10 gallons price=10*$10=$100 2nd 10 gallon Price=10*$9=90 (Discount of 10% or $1 after first 10 gallons) Total Paid $190 In case there would have been no discount than amount paid would have been $200(20*10) Savings $10. Total savings on Total fuel purchased=\(\frac{10}{20}\)=\(\frac{1}{2}\) Isabella First 10 gallon price=10*$10=100 2nd 15 gallon Price=15*$9=135 (Discount of 10% or $1 after first 10 gallons) Total Paid $235 In case there would have been no discount than amount paid would have been $250(25*$10) Savings $15. Total savings on Total fuel purchased=\(\frac{15}{25}\)=\(\frac{3}{5}\)
% of \(\frac{Isabella}{Kim}\)= \(\frac{3}{5}\)÷\(\frac{1}{2}\)=\(\frac{6}{5}\)=1.2*100=120%
Re: During a special promotion, a certain filling station is offering a 10
[#permalink]
Show Tags
20 Oct 2018, 06:08
Hello from the GMAT Club BumpBot!
Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
close
62% (02:19) correct 
