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 →

lightbulbs

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
Legendary Member
Posts: 1035
Joined: Wed Aug 27, 2008 10:56 pmFollowed by: 1 member
Thanked: 104 times

by scoobydooby » Sat Jun 20, 2009 9:45 am
try setting up a 2 by 2 matrix, it gets much easier.



1) with the info given, we can find out the number of unbroken in box 2

2) solving for z which is 32, we can populate the matrix and find out the required info.

both statements are equally sufficient.
Attachments
Book1.xls
(13.5 KiB) Downloaded 100 times
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Senior | Next Rank: 100 Posts
Posts: 77
Joined: Sat Dec 27, 2008 10:58 pm
Thanked: 4 times

by hetavdave » Sat Jun 20, 2009 9:48 am
scoobydoo...fantastic :)

you made that look so easy...I feel like kicking my own ass for missing this :)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 148
Joined: Wed Jun 03, 2009 8:04 pmFollowed by: 1 member
Thanked: 18 times

by ghacker » Sun Jun 21, 2009 10:05 am
There is no need for a matrix to solve this question , its very basic logic

First statement is sufficient ( there is no problem with it)

Lets look at the second one

Before that what is given :

1.0 there are 55 bulbs
2.0 2 broken bulbs - First box
3.0 5 broken bulbs in the second
{ remember that the total (55) includes the broken ones and there distribution is given )

so from this we know that (2+good bulbs in A)+(5+good ones in B) =55

so B has three o extra bad bulbs

Then Statement II states that A has 12 more B , so we can find out how many good bulbs are there in B

Sufficient

So D
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1