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 →

Rats

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Junior | Next Rank: 30 Posts
Posts: 14
Joined: Tue Dec 29, 2009 11:03 pm
by nlpfollower » Mon Mar 15, 2010 9:42 pm
Forty percent of the rats included in an experiment were male rats. If some of the rats died during the experiment and 30 percent of the rats that died were male rats, what was the ratio of the death rate among the male rats to the death rate among the female rats?

A. 9/14
B. 3/4
C. 9/11
D. 6/7
E. 7/8
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
Newbie | Next Rank: 10 Posts
Posts: 5
Joined: Tue Jul 22, 2008 11:00 pm

by koolk86 » Mon Mar 15, 2010 10:16 pm
Hi ,

Can you post the OA??
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 232
Joined: Sun Feb 28, 2010 10:47 pm
Thanked: 10 times

by Phirozz » Mon Mar 15, 2010 10:29 pm
nlpfollower wrote:Forty percent of the rats included in an experiment were male rats. If some of the rats died during the experiment and 30 percent of the rats that died were male rats, what was the ratio of the death rate among the male rats to the death rate among the female rats?

A. 9/14
B. 3/4
C. 9/11
D. 6/7
E. 7/8
IMO A

let say thr are 100 rats our of which 40 are male and 60 are female rats
Lets assume that 'x' rate died in experiment
30% of x is male and 70% of x is female
So 3x/10 are male and 7x/10 are female
Now to calculate death rate among male rates and female rats is
(3x*100/400)/7x*(100/600) ie 9/14
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 232
Joined: Sun Feb 28, 2010 10:47 pm
Thanked: 10 times

by Phirozz » Mon Mar 15, 2010 10:30 pm
Phirozz wrote:
nlpfollower wrote:Forty percent of the rats included in an experiment were male rats. If some of the rats died during the experiment and 30 percent of the rats that died were male rats, what was the ratio of the death rate among the male rats to the death rate among the female rats?

A. 9/14
B. 3/4
C. 9/11
D. 6/7
E. 7/8
IMO A

let say thr are 100 rats our of which 40 are male and 60 are female rats
Lets assume that 'x' rate died in experiment
30% of x is male and 70% of x is female
So 3x/10 are male and 7x/10 are female
Now to calculate death rate among male rates and female rats is
(3x*100/400)/7x*(100/600) ie 9/14
In exam, u should assume some figure for number of rats dies to make ur calculation easy
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 14
Joined: Tue Dec 29, 2009 11:03 pm

by nlpfollower » Mon Mar 15, 2010 11:22 pm
OA is A. thanks guuys..
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 610
Joined: Fri Jan 15, 2010 12:33 amFollowed by: 2 members
Thanked: 47 times

by kstv » Mon Mar 15, 2010 11:50 pm
Male = 40 Female 60
Total Death = 10 x
male death = 3x/40
------------- ------------------------- = 9/14
female death 7x/60
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1