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.

OG Review question pg 20 #4

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 100
Joined: Sat Sep 11, 2010 6:57 pm
Thanked: 2 times
by shoot4greatness » Mon Jan 17, 2011 4:29 pm
Hi ya'll, I just took the quant. sample question test and there's a question that still bugs me.

Among a group of 2500 people, 35 percent invested in municipal bonds, 18 percent invest in oil stock, and 7 percent invest in both municipal bonds and oil stocks. If 1 person is to be randomly selected from the 25000 people, what is the probability that the person selected will be one who invests in municipal bonds but NOT in oil stocks?

Why do you have to subtract 7% from 35%? Is it because7% who invested in both constitute a part of the 35% of municipal bonds?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Quantitative Reasoning |
Master | Next Rank: 500 Posts
Posts: 161
Joined: Mon Apr 05, 2010 9:06 am
Location: Mumbai
Thanked: 37 times

by 4GMAT_Mumbai » Mon Jan 17, 2011 9:50 pm
Hi,

Yes - That is right ...

People who invested in both = 7%

People who invested in Muni and not in oil = 35 - 7 = 28%

People who invested in oil and not in Muni = 18 - 7 = 11%

People who invested in at least one of the two = 35 + 18 - 7 = 46%
Naveenan Ramachandran
4GMAT, Dadar(W) & Ghatkopar(W), Mumbai
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 100
Joined: Sat Sep 11, 2010 6:57 pm
Thanked: 2 times

by shoot4greatness » Mon Jan 17, 2011 10:10 pm
thank you 4GMAT_Mumbai,

As I was going through the problems, it became apparent that unless the problem specifically states "only", you have to subtract the possibility of both occurance from a, but not b or b but not a. The 7% overlaps between 35 and 18. Thank you again for confirmation. Fight on!!!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1