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.

OG Problem.. Please help

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 33
Joined: Mon Nov 17, 2008 12:08 pm
Thanked: 1 times
by NehaBhandari » Fri Dec 12, 2008 9:12 pm
A marketing firm determined that out of 200 households surveyed 80 used neither brand A nor brand B soap. 60 used only Brand A soap and for every household that used both brands of soap 3 used only Brand B. How many of the 200 households surveyed use both brands..

1)15
2)20
3)30
4)40
5)45

Can someone use the formula

T=G1+G2-Both+Neither

and come to the right answer..... Please give ur explainations.. I am not geting the ansswer when I apply the formula..Your hlp is appreciated
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
Senior | Next Rank: 100 Posts
Posts: 61
Joined: Mon Nov 17, 2008 11:35 pmFollowed by: 1 member
Thanked: 6 times

by brb588 » Fri Dec 12, 2008 9:26 pm
I don't think it's necessary. You're trying to find out how many people use both brands. Start with 200 people. 80 pf them use nothing, so subtract it from 200 and get 120. 60 used only brand A, so subtract 60 from 120, and you have 60 left.

Now it's simple algebra. Let x = the amount of people who use both brands. The problems says for every one person that uses both, 3 use only B. Therefore:

3x + x = 60, x = 15

The amount that use both brands is 15, choice A.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 33
Joined: Mon Nov 17, 2008 12:08 pm
Thanked: 1 times

by NehaBhandari » Fri Dec 12, 2008 9:39 pm
True.. But I need to know why the above formula fails.. am i missing some concept.

By applying the formula
T= G1+G2 -Both+Neither
200= 60+3x-x+80
60 = 2x
x =30 which is wrong OA is A


Am I doing something wrong here.. plz help!!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Community Manager
Posts: 1049
Joined: Sun Apr 06, 2008 5:15 pmFollowed by: 27 members
Location: Pittsburgh, PA
Thanked: 113 times
GMAT Score:710

by dmateer25 » Fri Dec 12, 2008 9:45 pm
NehaBhandari wrote:True.. But I need to know why the above formula fails.. am i missing some concept.

By applying the formula
T= G1+G2 -Both+Neither
200= 60+3x-x+80
60 = 2x
x =30 which is wrong OA is A


Am I doing something wrong here.. plz help!!
The formula doesn't work because the question says that 60 used only Brand A soap.

Total = Only A + Only B + AB + Neither

Let x = those that AB

200 = 60 + 3x + x + 80
200 = 140 + 4x
60=4x
15=x
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 61
Joined: Mon Nov 17, 2008 11:35 pmFollowed by: 1 member
Thanked: 6 times

by brb588 » Fri Dec 12, 2008 10:01 pm
I just found out that the formula is switched up for this question

https://www.manhattangmat.com/forums/post4973.html
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 33
Joined: Mon Nov 17, 2008 12:08 pm
Thanked: 1 times

by NehaBhandari » Fri Dec 12, 2008 10:11 pm
Great!!.. Thanks for the help guys...I need to know some serious stuff here ..

Thanks again.. keep replying :)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1