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
Vote for Target Test Prep, Newsweek Readers’ Choice Awards 2026
NEWSWEEK READERS’ CHOICE 2026

BIG NEWS! Target Test Prep has been nominated, and they’d love your vote!

TTP has worked incredibly hard to build the best test prep experience possible, and winning Newsweek’s 2026 Readers’ Choice Award for Best Test Prep would mean a lot to them. If TTP has helped you, they’d be incredibly grateful for your vote. You can vote once each day through September 9.

Vote for TTP
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.

gmatprep - sets problem

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 50
Joined: Fri Jun 06, 2008 6:19 pm
Thanked: 3 times
by shahab03 » Fri Sep 12, 2008 9:31 am
please explain your solution..
thanks


when 1,000 children were inoculated with a certain vaccine, some developed inflammation at the site of the inoculation and some developed fever. How many of the children developed inflammation but not fever ?

(1) 880 children developed neither inflammation nor fever
(2) 20 children developed fever.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
Senior | Next Rank: 100 Posts
Posts: 86
Joined: Tue Aug 05, 2008 10:50 am
Thanked: 7 times

by hengirl03 » Fri Sep 12, 2008 9:53 am
I tried to solve this problem by filling out a table. However, it couldn't fill the table completely. So I think the answer is E. What is the official answer?
Attachments
table.JPG
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 343
Joined: Mon Jan 21, 2008 3:28 pm
Thanked: 4 times

by arorag » Fri Sep 12, 2008 11:42 am
Ans should be C

draw venn diagram
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 86
Joined: Tue Aug 05, 2008 10:50 am
Thanked: 7 times

by hengirl03 » Fri Sep 12, 2008 11:53 am
Would you explain how you got C please?

Is it:

There 120 students w/ fever or inflammation.
20 of those student have the only fever or the fever w/ inflammation.
So, 100 of the students have only inflammation.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1153
Joined: Wed Jun 20, 2007 6:21 amFollowed by: 2 members
Thanked: 146 times

Re: gmatprep - sets problem

by parallel_chase » Fri Sep 12, 2008 1:15 pm
shahab03 wrote:please explain your solution..
thanks


when 1,000 children were inoculated with a certain vaccine, some developed inflammation at the site of the inoculation and some developed fever. How many of the children developed inflammation but not fever ?

(1) 880 children developed neither inflammation nor fever
(2) 20 children developed fever.
Answer should be C

Inflammation - I
Fever - F

Total = F + I - Both (I+F) + Neither (I+F)

I - Both (I+F) = ???

Statements 1 & 2 are clearly insufficient alone.

Combining 1 & 2

1000 = 20 + I - Both (I+F) + 880

I - Both (I+F) = 100

Sufficient.

Hence C is the answer.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 162
Joined: Mon Jul 28, 2008 8:33 pm
Location: San Jose,CA
Thanked: 1 times

by ddm » Fri Sep 12, 2008 4:10 pm
To parallel_chase

2nd statement mentions that 20 children developed fever...but it is even possible that few out of 20 even developed inflammation...

N the question is asking How many of the children developed inflammation but not fever.

I - Both (I+F) = 100
This does not answer the question
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 144
Joined: Thu Apr 17, 2008 3:33 pm
Thanked: 8 times

by Sunny22uk » Fri Sep 12, 2008 6:37 pm
ddm wrote:To parallel_chase

2nd statement mentions that 20 children developed fever...but it is even possible that few out of 20 even developed inflammation...

N the question is asking How many of the children developed inflammation but not fever.

I - Both (I+F) = 100
This does not answer the question
You are right it is quite possible that few out of 20 even developed inflammation. The question asks How many of the children developed inflammation but not fever ? If 20 of them developed fever,they can be subtracted
You cannot discover new oceans unless you have the courage to loose sight of the shore.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 30
Joined: Sat Apr 10, 2010 7:04 pmFollowed by: 1 member
Thanked: 3 times

by greentealeaf » Tue May 04, 2010 1:14 am
ddm wrote:To parallel_chase

2nd statement mentions that 20 children developed fever...but it is even possible that few out of 20 even developed inflammation...

N the question is asking How many of the children developed inflammation but not fever.

I - Both (I+F) = 100
This does not answer the question
NOT FEVER is important. don't confuse it with Inflammation.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1