It is currently 18 Oct 2017, 17:29

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Last Sunday a certain store sold copies of Newspaper A for

Author Message
Senior Manager
Joined: 28 Jun 2007
Posts: 315

Kudos [?]: 52 [0], given: 0

Last Sunday a certain store sold copies of Newspaper A for [#permalink]

### Show Tags

15 Sep 2007, 15:39
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Last Sunday a certain store sold copies of Newspaper A for \$1.00 each and copies of Newspaper B for \$1.25 each, and the store sold no other newspapers that day. If r percent of the store’s revenues from newspaper sales was from Newspaper A and if p percent of the newspapers that the store sold were copies of newspaper A, which of the following expresses r in terms of p?

A. 100p / (125 – p)
B. 150p / (250 – p)
C. 300p / (375 – p)
D. 400p / (500 – p)
E. 500p / (625 – p)

Kudos [?]: 52 [0], given: 0

Director
Joined: 22 Aug 2007
Posts: 566

Kudos [?]: 71 [1], given: 0

Re: PS: Set 6, Q28 - Word Translation [#permalink]

### Show Tags

15 Sep 2007, 17:20
1
KUDOS
gluon wrote:
Last Sunday a certain store sold copies of Newspaper A for \$1.00 each and copies of Newspaper B for \$1.25 each, and the store sold no other newspapers that day. If r percent of the store’s revenues from newspaper sales was from Newspaper A and if p percent of the newspapers that the store sold were copies of newspaper A, which of the following expresses r in terms of p?

A. 100p / (125 – p)
B. 150p / (250 – p)
C. 300p / (375 – p)
D. 400p / (500 – p)
E. 500p / (625 – p)

I got D,

Given:
A- # of A newspapers
B- # of B newspapers

Stem says;

R(a)=100*A
R(b)=125*B
R(a) and R (b) revenues from sale of a and b newspapers respectively.

r/100=R(a)/ (R(a)+R(b))
p/100=A/ (A+B)

Solution:

100/r=(R(a)+R(b))/R(a)= 1+R(b)/R(a)= 1+ 125B/100A------>
100/r=1+5/4 (B/A)

100/p=(A+B)/A=1+B/A------> B/A=100/p-1

Plug in B/A=100/p-1 into 100/r=1+5/4 (B/A) and solve for r

it comes to D
=)

Kudos [?]: 71 [1], given: 0

Senior Manager
Joined: 28 Jun 2007
Posts: 315

Kudos [?]: 52 [1], given: 0

### Show Tags

15 Sep 2007, 22:43
1
KUDOS
Wow that's brilliant Irina!! I got till r/100=R(a)/ (R(a)+R(b)) and
p/100=A/(A+B), then stared at that problem for 10 minutes before giving up.

Kudos [?]: 52 [1], given: 0

Manager
Status: Post MBA, working in the area of Development Finance
Joined: 09 Oct 2006
Posts: 168

Kudos [?]: 3 [0], given: 1

Location: Africa
Re: PS: Set 6, Q28 - Word Translation [#permalink]

### Show Tags

16 Sep 2007, 03:15
Let the no. of papers be A and B.
p= A/(A+B)*100 =>100/p=1+B/A
r= A/(A+1.25B)*100=>100/r=1+1.25B/A
100/r=1+1.25B/A=1+1.25(100/p-1)
100/r=(125-0.25p)/p
r=100p/(125-0.25p) which is the same as D
gluon wrote:
Last Sunday a certain store sold copies of Newspaper A for \$1.00 each and copies of Newspaper B for \$1.25 each, and the store sold no other newspapers that day. If r percent of the store’s revenues from newspaper sales was from Newspaper A and if p percent of the newspapers that the store sold were copies of newspaper A, which of the following expresses r in terms of p?

A. 100p / (125 – p)
B. 150p / (250 – p)
C. 300p / (375 – p)
D. 400p / (500 – p)
E. 500p / (625 – p)

Kudos [?]: 3 [0], given: 1

Re: PS: Set 6, Q28 - Word Translation   [#permalink] 16 Sep 2007, 03:15
Display posts from previous: Sort by

# Last Sunday a certain store sold copies of Newspaper A for

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne 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®.