Last visit was: 18 Nov 2025, 21:56 It is currently 18 Nov 2025, 21:56
Home
GMAT
Messages
Tests
Schools
Events
Rewards
Chat
My Profile
Close
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
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 18 Nov 2025
Posts: 105,355
Own Kudos:
778,101
Given Kudos: 99,964
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 105,355
Kudos: 778,101
A copy service charges $0.05 per copy for the first 100 copies, $0.04 10 Oct 2019, 03:42
Kudos
Add Kudos
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

5% (low)

Question Stats:

93% (00:59) correct 7% (00:51) wrong based on 423 sessions

History

Date
Time
Result
Not Attempted Yet
A copy service charges $0.05 per copy for the first 100 copies, $0.04 per copy for the next 100 copies, and $0.03 per copy for all copies thereafter. What would the copy service charge for 350 copies?

(A) $10.50
(B) $11.50
(C) $12.00
(D) $13.00
(E) $13.50
ShowHide Answer
Official Answer
E
User avatar
Mohammadmo
User avatar
Joined: 29 Jun 2019
Last visit: 03 Nov 2022
Posts: 347
Own Kudos:
245
Given Kudos: 16
Posts: 347
Kudos: 245
A copy service charges $0.05 per copy for the first 100 copies, $0.04 10 Oct 2019, 04:09
Kudos
Add Kudos
Bookmarks
Bookmark this Post
100×0.05 + 100×0.04 + 150×0.03=
5+4+4.5=13.5
Option E

Posted from my mobile device
User avatar
Abhishek009
User avatar
Board of Directors
Joined: 11 Jun 2011
Last visit: 18 Jul 2025
Posts: 5,937
Own Kudos:
5,327
 [1]
Given Kudos: 463
Status:QA & VA Forum Moderator
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Posts: 5,937
Kudos: 5,327
 [1]
A copy service charges $0.05 per copy for the first 100 copies, $0.04 10 Oct 2019, 09:55
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
A copy service charges $0.05 per copy for the first 100 copies, $0.04 per copy for the next 100 copies, and $0.03 per copy for all copies thereafter. What would the copy service charge for 350 copies?

(A) $10.50
(B) $11.50
(C) $12.00
(D) $13.00
(E) $13.50
Show more

\((100*0.05) + (100*0.04) + (150*0.03) = 5 + 4 + 4.5 = 13.50\) , Answer must be (E) 13.50
avatar
bkastan
avatar
Joined: 25 Jul 2017
Last visit: 21 Oct 2020
Posts: 16
Own Kudos:
9
Given Kudos: 18
Posts: 16
Kudos: 9
A copy service charges $0.05 per copy for the first 100 copies, $0.04 10 Oct 2019, 16:39
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Notice that the question is using 100. This will simplify the arithmetic because you can slide decimal places

0.05 x 100 = 5 (shift decimal to right twice)
0.04 x 100 = 4
0.03 x 150 (remaining copies) = 4.5

Sum is 13.50

Advice: 3 x 150 is the same as 3(100+50)

Posted from my mobile device
User avatar
EgmatQuantExpert
User avatar
e-GMAT Representative
Joined: 04 Jan 2015
Last visit: 02 Apr 2024
Posts: 3,663
Own Kudos:
20,163
Given Kudos: 165
Expert
Expert reply
Posts: 3,663
Kudos: 20,163
A copy service charges $0.05 per copy for the first 100 copies, $0.04 28 Nov 2020, 00:30
Kudos
Add Kudos
Bookmarks
Bookmark this Post

Solution



Given
In this question, we are given that
    • A copy service charges $0.05 per copy for the first 100 copies, $0.04 per copy for the next 100 copies, and $0.03 per copy for all copies thereafter

To find
We need to determine
    • The service charge for 350 copies

Approach and Working out
We can deduce a generalised expression for n copies, where n > 200 (here 200 = 100 + 100)

Charge for the first 100 copies = 100 x 0.05 = 5
Charge for the next 100 copies = 100 x 0.04 = 4
    • Hence, charge for the first 200 copies = 5 + 4 = 9

For total n (>200) copies,
    • Total service charge = 9 + (n – 200) x 0.03

If n = 350, then the total service charge = 9 + (350 – 200) x 0.03 = 9 + 150 x 0.03 = 9 + 4.5 = 13.5

Thus, option E is the correct answer.

Correct Answer: Option E
Moderators:
Bunuel
Math Expert
105355 posts
Krunaal
Tuck School Moderator
805 posts