BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
GMATLiveTeach Starts Oct 17
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Chris Peckover, 100th-Percentile GMAT Scorer

Oct 17 · Chris Peckover
Sat · 11:00 AM to 2:00 PM ET
Oct 20 · Chris Peckover
Tue, Thu · 8:00 to 10:00 PM ET
Oct 25 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemand 5 seats left Start anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Kaplan DS

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 1893
Joined: Sun May 30, 2010 11:48 pmFollowed by: 7 members
Thanked: 215 times

by kvcpk » Sun Aug 29, 2010 10:41 am
debmalya_dutta wrote:I got this one wrong - Can someone help me out by solving this
Image
X/Y = 7

assume total of 80+N people.
70 buy X
10 buy Y.
N buy neither

Percentage of y = 10/(80+N) *100
=1000/80+N

27 percent of (80+N) purchase neither x nor y. = N
which means N can be calculated.
hence percentage of Y can be calculated.
SUFF

70 percent purchase both x and y
We have no info about how manybuy neither. Hence we do not know the total number of people.
Therefore, percentage cannot be calculated.
INSUFF

pick A.

Whats the OA?
"Once you start working on something,
don't be afraid of failure and don't abandon it.
People who work sincerely are the happiest."
Chanakya quotes (Indian politician, strategist and writer, 350 BC-275BC)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 385
Joined: Sun Jul 12, 2009 10:16 pmFollowed by: 2 members
Thanked: 29 times
GMAT Score:710

by debmalya_dutta » Sun Aug 29, 2010 10:44 am
thanks Mate...I had picked A :) and I was so dead sure that I thought that I must be missing some aspect of the question.. per Kaplan (the GMAT test 2) , the answer is C...

Hey..try the other one I just posted..I think I incorrectly posted it within DS... But take a look..I got that wrong too.. I am not sure why?
@Deb
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 258
Joined: Thu Aug 07, 2008 5:32 am
Thanked: 16 times

by x2suresh » Sun Aug 29, 2010 11:12 am
debmalya_dutta wrote:thanks Mate...I had picked A :) and I was so dead sure that I thought that I must be missing some aspect of the question.. per Kaplan (the GMAT test 2) , the answer is C...

Hey..try the other one I just posted..I think I incorrectly posted it within DS... But take a look..I got that wrong too.. I am not sure why?
Think this way..

What about people who buy both X and Y.

so, you can't say that Xonly+ Yonly+ both +N =100

do you know Xonly or Yonly ? no.. so A can't be the answer.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 385
Joined: Sun Jul 12, 2009 10:16 pmFollowed by: 2 members
Thanked: 29 times
GMAT Score:710

by debmalya_dutta » Sun Aug 29, 2010 11:23 am
x2suresh wrote:
debmalya_dutta wrote:thanks Mate...I had picked A :) and I was so dead sure that I thought that I must be missing some aspect of the question.. per Kaplan (the GMAT test 2) , the answer is C...

Hey..try the other one I just posted..I think I incorrectly posted it within DS... But take a look..I got that wrong too.. I am not sure why?
Think this way..

What about people who buy both X and Y.

so, you can't say that Xonly+ Yonly+ both +N =100

do you know Xonly or Yonly ? no.. so A can't be the answer.
Dont think I need to know Xonly or Yonly etc... In the question asks for Y (doesnt make any distinction between Y only vs Y &X)... The question is what % of population purchase Newspaper Y ... It doesnt ask for % of population purchasing only Newspaper Y
@Deb
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 1893
Joined: Sun May 30, 2010 11:48 pmFollowed by: 7 members
Thanked: 215 times

by kvcpk » Sun Aug 29, 2010 11:55 am
I see why the answer is C now. Let me re-write my post.

X/Y = 7

assume total of 80+N people.
70 buy X. 70 - B buy only X
10 buy Y. 10 - B buy only Y
B buy both.
N buy neither

Total y = only Y + B
= 10 - B + B


Total = only X + only Y + both + neither
Total = 70 - B + 10 - B + B + N
Total = 70 - B + total Y + N
Total - N - 70 + B = total Y
Hence we need both B and N to find the percentage of Y

27 percent of (80+N) purchase neither x nor y. = N
which means N can be calculated.
But still we are unknown about B.
INSUFF

70 percent purchase both x and y
only B is given. we need N too.
INSUFF

Combining, we get both B and N.
pick C.
"Once you start working on something,
don't be afraid of failure and don't abandon it.
People who work sincerely are the happiest."
Chanakya quotes (Indian politician, strategist and writer, 350 BC-275BC)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 385
Joined: Sun Jul 12, 2009 10:16 pmFollowed by: 2 members
Thanked: 29 times
GMAT Score:710

by debmalya_dutta » Sun Aug 29, 2010 1:27 pm
kvcpk wrote:I see why the answer is C now. Let me re-write my post.

X/Y = 7

assume total of 80+N people.
70 buy X. 70 - B buy only X
10 buy Y. 10 - B buy only Y
B buy both.
N buy neither

Total y = only Y + B
= 10 - B + B


Total = only X + only Y + both + neither
Total = 70 - B + 10 - B + B + N
Total = 70 - B + total Y + N
Total - N - 70 + B = total Y
Hence we need both B and N to find the percentage of Y

27 percent of (80+N) purchase neither x nor y. = N
which means N can be calculated.
But still we are unknown about B.
INSUFF

70 percent purchase both x and y
only B is given. we need N too.
INSUFF

Combining, we get both B and N.
pick C.
thanks ...

@x2suresh
You were right.. Oversight at my end..Thanks
@Deb
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1