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

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Confusing DS

Expert replies
by [email protected] » Sun Jun 19, 2011 6:09 am
Working together, Michelle and John can type a manuscript in 60 hrs. How long does it take Martha and Jeff working together to type the same manuscript.

Statement 1:
Michelle types 60 wpm and John types 40 wpm.

Statement 2:
Martha types 30 wpm and Jeff types 80 wpm.


According to me the answer is E, but the test answer says that OA is C. Please any of the experts please help....
IT IS TIME TO BEAT THE GMAT

LEARNING, APPLICATION AND TIMING IS THE FACT OF GMAT AND LIFE AS WELL... KEEP PLAYING!!!

Whenever you feel that my post really helped you to learn something new, please press on the 'THANK' button.
Join the discussion
Source: — Data Sufficiency |

by Frankenstein » Sun Jun 19, 2011 6:14 am
Hi,
Let the typing rates of 4 of them be a,b,c,d
From(1): a=60, b=40
a+b = 100wpm
Number of words = 100*(60*60)
No info. about c and
Not sufficient
From(2): c=30, d=80
c+d = 110wpm
No info about number of words
Not sufficient
Both (1) and (2) :
Time taken = 100*60*60/110
Sufficient

Hence, C
Cheers!

Things are not what they appear to be... nor are they otherwise
Join the discussion

by Geva@EconomistGMAT » Sun Jun 19, 2011 6:28 am
[email protected] wrote:Working together, Michelle and John can type a manuscript in 60 hrs. How long does it take Martha and Jeff working together to type the same manuscript.

Statement 1:
Michelle types 60 wpm and John types 40 wpm.

Statement 2:
Martha types 30 wpm and Jeff types 80 wpm.


According to me the answer is E, but the test answer says that OA is C. Please any of the experts please help....
Since time = work/rate, in order to find the time it takes Martha and Jeff, you need two things:

The amount of work to be done AND
The combined rate of Martha and Jeff

Stat. (1) gives you the work involved: 60 hours * 100*60 wph combined rate.

Stat. (2) gives you the combined rate of Matha and Jake

thus, both are sufficient.

Why did you think that the answer was E?
Geva
Senior Instructor
Master GMAT
1-888-780-GMAT
https://www.mastergmat.com
Join the discussion