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 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

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
Limited cohort · enrollment openTarget 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.

Crazy problem solving question..

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Junior | Next Rank: 30 Posts
Posts: 25
Joined: Wed Mar 26, 2008 10:30 am
Location: so cal

by freedsl » Sun Apr 27, 2008 10:24 am
they are asking for bread only buyers which equals neiter( C or M) buyers which equals 1-probability of M&C ONLY buyers.


C only = 50-20 =30
M only = 40-20 =20



then P (M&C) = 20+30/100 or 1/2

1-1/2 =1/2 probability of M only.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 11
Joined: Wed Feb 27, 2008 4:52 pm

by reach.ran » Sun Apr 27, 2008 10:52 am
freedsl wrote:they are asking for bread only buyers which equals neiter( C or M) buyers which equals 1-probability of M&C ONLY buyers.


C only = 50-20 =30
M only = 40-20 =20



then P (M&C) = 20+30/100 or 1/2

1-1/2 =1/2 probability of M only.
Thanks for answereing, but the correct answer is 3/10 not 1/2. thanks again.. someone else please help me..
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 25
Joined: Wed Mar 26, 2008 10:30 am
Location: so cal

by freedsl » Sun Apr 27, 2008 12:12 pm
What i did wrong was take 20 off twice, anyway

So you have the formula ALL buyers that trade in M and C (Unique buyers) = M+C- both (M&C) = 50+40-20 =70 the prob for this is 70/100 or 7/10

the opossite which would be only B buyers is 1- 7/10 =3/10
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 12
Joined: Mon Jan 21, 2008 11:12 pm

Kaplan formula

by jscoligan » Mon Apr 28, 2008 3:24 pm
Cake+muffin+neither-both=Real total

50+40+neither-20=100

neither=30

30/100=> 3/10
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
GMAT Instructor
Posts: 3225
Joined: Tue Jan 08, 2008 2:40 pmFollowed by: 614 members
Location: Toronto
Thanked: 1710 times
GMAT Score:800

Re: Kaplan formula

by Stuart@KaplanGMAT » Mon Apr 28, 2008 7:43 pm
jscoligan wrote:Cake+muffin+neither-both=Real total

50+40+neither-20=100

neither=30

30/100=> 3/10
Kaching!

Perfect question for the overlapping sets formula:

True # of items = # with characteristic 1 + # with char 2 + # with neither char - # with both chars

In this case:

100 = 50 + 40 + neither - 20
100 = 70 + neither
30 = neither

So, probability of finding a "neither" person is 30/100 = 3/10
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
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1