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 →

factory-installed memory

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members
Location: India
Thanked: 267 times
GMAT Score:760
by sanju09 » Mon Feb 09, 2009 2:49 am
Purchasers of a certain electronic device are given the option of expanding the factory-installed RAM memory capacity at a cost of $60 per additional megabyte of memory capacity. What is the size, in megabytes, of the factory-installed memory capacity?
(1) The cost of expanding the memory capacity by 50 percent is $240.
(2) A version of the device with expanded memory costing $240 has 3/4 as much memory as a version of the device with an expanded memory costing $480.


IMO D
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
Site Admin
Posts: 2567
Joined: Thu Jan 01, 2009 10:05 amFollowed by: 550 members
Thanked: 712 times
GMAT Score:770

by DanaJ » Mon Feb 09, 2009 2:54 am
Say x = factory-installed memory capacity.
1. Expanding the capacity by 50% means that you expand by an additional 50% of x or 0.5x with $240. Since you pay $60 per megabyte, then you pay for 240/60 = 4 megabytes. This means that 0.5x = 4, making x = 8.

2. Again, you have 4 megabytes extra memory for the price of $240 and 8 megabytes for $480. Since the first version has 3/4 as much memory as the version with 8 added megabytes, you get this equation:
x + 4 = 3/4(x + 8), so you can easily find x.

This means that your answer is correct.
Last edited by DanaJ on Mon Feb 09, 2009 4:37 am, edited 1 time in total.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members
Location: India
Thanked: 267 times
GMAT Score:760

by sanju09 » Mon Feb 09, 2009 3:06 am
DanaJ wrote:Say x = factory-installed memory capacity.
1. Expanding the capacity by 50% means that you by an additional 50% of x or 0.5x with $240. Since you pay $60 per megabyte, then you pay for 240/60 = 4 megabytes. This means that 0.5x = 4, making x = 8.

2. Again, you have 4 megabytes extra memory for the price of $240 and 8 megabytes for $480. Since the first version has 3/4 as much memory as the version with 8 added megabytes, you get this equations:
x + 4 = 3/4(x + 8), so you can easily find x.

This means that your answer is correct.
:D You make things look so simple, Danaj; it's really gr8! But you occasionally make certain spelling and Grammar errors in your explanations, which are harmful on GMAT.
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Site Admin
Posts: 2567
Joined: Thu Jan 01, 2009 10:05 amFollowed by: 550 members
Thanked: 712 times
GMAT Score:770

by DanaJ » Mon Feb 09, 2009 4:41 am
Sorry, I was in a hurry; made some corrections. If you still see any, then please let me know.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1