Find all School-related info fast with the new School-Specific MBA Forum

It is currently 29 Jul 2015, 08:16
GMAT Club Tests

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

the management of a store holding a 4 week sale finds that

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
VP
VP
avatar
Joined: 30 Sep 2004
Posts: 1488
Location: Germany
Followers: 4

Kudos [?]: 111 [0], given: 0

the management of a store holding a 4 week sale finds that [#permalink] New post 15 Feb 2005, 07:02
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

the management of a store holding a 4 week sale finds that the average of daily sales increases each week by the same amount. if the overall average for the entire sale was 3,300$ and the average for week 3 was 20% higher than the average for week 2, by how much did the average for the last week exceed the average daily sales for the first week ?

a 1320
b 1800
c 1920
d 2640
e 3960
VP
VP
avatar
Joined: 18 Nov 2004
Posts: 1441
Followers: 2

Kudos [?]: 23 [0], given: 0

 [#permalink] New post 15 Feb 2005, 07:16
"B"

Let x be the first week avg and y be the increment amount.
So we have for each week:

x x+y x+2y x+3y


4x+6y = 4*3300

2x+3y = 6600------(1)

2y = y + (x+y)/5
4y = x -----(2)


From Eq 1 and 2

y = 2*300

y = 600

So amt of increase = 3y = 1800
Intern
Intern
avatar
Joined: 11 Dec 2003
Posts: 49
Location: IN
Followers: 1

Kudos [?]: 9 [0], given: 0

 [#permalink] New post 17 Feb 2005, 11:33
banerjeea_98:

Could you please explain how you got the second equation ?

Thanks

2y = y + (x+y)/5
VP
VP
avatar
Joined: 30 Sep 2004
Posts: 1488
Location: Germany
Followers: 4

Kudos [?]: 111 [0], given: 0

 [#permalink] New post 17 Feb 2005, 12:26
1. week: x
2. week: x+y
3. week: x+2y
4. week: x+3y

=> (4x+6y)=3300 => 4x+6y=6600 <=> 1 eq

and the average for week 3 was 20% higher than the average for week 2 => x+2y=1,2 (x+y) <=> 2 eq

solve 1 + 2 and you get B)
  [#permalink] 17 Feb 2005, 12:26
Display posts from previous: Sort by

the management of a store holding a 4 week sale finds that

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.