Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 27 May 2017, 11:27

### 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

# In a certain city, the ratio of the number of people who

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Director
Joined: 23 Jun 2005
Posts: 841
GMAT 1: 740 Q48 V42
Followers: 6

Kudos [?]: 76 [0], given: 1

In a certain city, the ratio of the number of people who [#permalink]

### Show Tags

17 Oct 2006, 08:37
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions

### HideShow timer Statistics

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

In a certain city, the ratio of the number of people who purchase newspaper X to the number of people who purchase newspaper Y is 7:1. What percent of the population purchases newspaper Y?

I . Twenty-seven percent of the population purchases neither newspaper X nor newspaper Y.
II. Seventy percent of the people who purchase newspaper Y also purchase newspaper X.
Senior Manager
Joined: 13 Sep 2006
Posts: 279
Location: New York
Followers: 1

Kudos [?]: 19 [0], given: 0

Re: DS: Newspapers X and Y [#permalink]

### Show Tags

17 Oct 2006, 11:25
anandsebastin wrote:
In a certain city, the ratio of the number of people who purchase newspaper X to the number of people who purchase newspaper Y is 7:1. What percent of the population purchases newspaper Y?

I . Twenty-seven percent of the population purchases neither newspaper X nor newspaper Y.
II. Seventy percent of the people who purchase newspaper Y also purchase newspaper X.

Tough one. Statement 1 &2 on their own are not sufficient as both provide vital information. So that knocks out A, B & D. C & E remain. My vote is with E. 27% do not read any paper at all. So that leaves 73% of the population who read 1) only X 2) Only Y or 3) both X& Y.

I think I fell for somesort of trap here though:cry:
_________________

"Never let the fear of striking out get in your wayâ€

Senior Manager
Joined: 01 Oct 2006
Posts: 496
Followers: 1

Kudos [?]: 35 [0], given: 0

### Show Tags

17 Oct 2006, 12:29
Very Tricky...
st1 says 23% do not purchase x or y..but we cannot assume that remaining 67 purcahse x y or both..there other brands avaliable.. insuff
st2 says 70% who purchase y also purchase x this tells us that both xy=70/100 y...inuff as no information abt x...

Total =x+y-both+neither

Neither =23/100 T=0.23T ..from st 1
From st2 both xy =0.7y x=7y
Thus combining
T=7y+y-0.7y+.23T
We solve to get Y/T then multiply by 100 to get the required percentage..
Hence answer should be C..

Had chosen E earlier..

Last edited by yogeshsheth on 17 Oct 2006, 22:23, edited 1 time in total.
Director
Joined: 06 Sep 2006
Posts: 740
Followers: 2

Kudos [?]: 40 [0], given: 0

### Show Tags

17 Oct 2006, 13:53
A may be?

I) 100 - 27 = 83 percent buy newspapers( either X or Y).
X:Y = 7:1
X = (7/8) * 83
Y = (1/8) * 83

A.
Manager
Joined: 07 Jun 2006
Posts: 110
Followers: 2

Kudos [?]: 29 [0], given: 0

### Show Tags

17 Oct 2006, 21:36
Code:
In a certain city, the ratio of the number of people who purchase newspaper X to the number of people who purchase newspaper Y is 7:1. What percent of the population purchases newspaper Y?

I think the ANS depends on how you understand the Question.

CASE 1 : IGNORE OVERLAP
Here , only the % of people who purchase News Paper Y is asked.
Assuming that we can ignore the overlap (people purchasing both X n Y),
and find only the Y %

A is SUFF.
We have - 73 % of people who read atleast 1 news paper, be it X, be it Y or be it both.
We are given the ratio of X to Y. Y % can be found out.

CASE 1 : OVERLAP CONSIDERED

Here , its E I ges.

correct me if I am wrong.
Manager
Joined: 13 Aug 2005
Posts: 135
Followers: 1

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

### Show Tags

17 Oct 2006, 21:56
The answer is C.

Total = X+Y - both + neither

Need to find y/Total

From stmt1: Neither = 0 Insuff

From stmt2: Both= 0.75*y Insuff

Combined

y/Total = y/(y*7 +y - 0.75*y)

y can be cancelled out . Sufficient.
17 Oct 2006, 21:56
Display posts from previous: Sort by

# In a certain city, the ratio of the number of people who

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 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®.