Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
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.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 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
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
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
GMATOnDemandStart 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 563 reviewsTarget Test Prep

og ds 91

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Legendary Member
Posts: 789
Joined: Sun May 06, 2007 1:25 amFollowed by: 6 members
Location: Southern California, USA
Thanked: 15 times
by resilient » Mon Feb 11, 2008 1:20 pm
By what % did the median household income in country y decrease from 1970 to 1980?

1. 1970 the median houselhold income in country Y was 2/3 of the median household income in country x.

2. 1980 the median househol income country y was 1/2 of the median household income in country x..


statement 1 and 2 alone are insufficient however, why not c? I can plug in an imaginary number and force an answer!
Appetite for 700 and I scraped my plate!
Top
Join the discussion
Source: — Data Sufficiency |
Senior | Next Rank: 100 Posts
Posts: 83
Joined: Mon Oct 22, 2007 4:44 am
Thanked: 1 times

by its_me07 » Mon Feb 11, 2008 2:14 pm
Is it E?
St 1 donot give enough info abt country X mediaan income So INSUFF.
St 2 same case as above n moreover we dont know how much country x median income has changed. so we can not take C as well.


OA?
Top
Join the discussion
Legendary Member
Posts: 789
Joined: Sun May 06, 2007 1:25 amFollowed by: 6 members
Location: Southern California, USA
Thanked: 15 times

QA

by resilient » Mon Feb 11, 2008 8:22 pm
qa is e
Appetite for 700 and I scraped my plate!
Top
Join the discussion
User avatar
GMAT Instructor
Posts: 3224
Joined: Tue Jan 08, 2008 2:40 pmFollowed by: 614 members
Location: Toronto
Thanked: 1710 times
GMAT Score:800

Re: og ds 91

by Stuart@KaplanGMAT » Tue Feb 12, 2008 12:00 pm
Enginpasa1 wrote:By what % did the median household income in country y decrease from 1970 to 1980?

1. 1970 the median houselhold income in country Y was 2/3 of the median household income in country x.

2. 1980 the median househol income country y was 1/2 of the median household income in country x..


statement 1 and 2 alone are insufficient however, why not c? I can plug in an imaginary number and force an answer!
Because if you plug in different numbers, you'll get different answers. Since it's possible to get more than 1 answer to the question, the statements are insufficient.
Image

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

Kaplan Exclusive: The Official Test Day Experience | Ready to Take a Free Practice Test? | Kaplan/Beat the GMAT Member Discount
BTG100 for $100 off a full course
Top
Join the discussion