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

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

DS question from GMAT PREP - III

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
Senior | Next Rank: 100 Posts
Posts: 50
Joined: Thu Oct 04, 2007 12:26 pmFollowed by: 3 members
Location: RTP, NC
Thanked: 26 times

by achandwa » Tue Oct 09, 2007 11:42 am
Assume Bob made Y items last week. Thus he made:

36 * X + (Y-36) * 1.5X - assuming Y > 36, or
36 * X - if Y <= 36

i) Bob made $480 last week

Therefore, 36 * X + (Y-36) * 1.5X = 480 - since we do not know if Y <=36 we need to consider this general case.
2 variables and one equation - not sufficient to solve

ii) Bob made 2 more items this week than he did last week and he made $510. Thus he made Y+2 items this week and,

36 * X + (Y+2-36) * 1.5X = 510.
36 * X + (Y-34) * 1.5X = 510
Again 2 variables and one equation - not sufficient to solve

But combining i) and ii), we have 2 variables and 2 unknowns. That's enough info to solve the problem. Hence C.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 6
Joined: Tue Sep 25, 2007 1:03 am

by santsark » Tue Oct 09, 2007 11:18 pm
achandwa - you are making an assumption that Y>36.

If this assumption is not true, then won't the answer be different.

I think it should be E.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 50
Joined: Thu Oct 04, 2007 12:26 pmFollowed by: 3 members
Location: RTP, NC
Thanked: 26 times

by achandwa » Wed Oct 10, 2007 4:33 am
On second thought, I think you are right. Thanks for pointing it out.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 50
Joined: Mon Jul 02, 2007 4:18 pm

by jay2007 » Wed Oct 10, 2007 7:44 pm
santsark is right. I also assumed that y > 36 and choose C, which is not the right answer.

OA is E.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1