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 →

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