Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
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.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
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 Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart 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 563 reviewsTarget Test Prep

16 people to choose from

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members
Location: India
Thanked: 267 times
GMAT Score:760
by sanju09 » Wed Sep 15, 2010 9:36 pm
If there are 16 people to choose from, what is the ratio of the number of possible 7-person committees to the number of possible 8-person committees?
(A) 7:8
(B) 8:7
(C) 7:9
(D) 8:9
(E) 9:8



[spoiler]Source: https://readyforgmat.com[/spoiler]
The mind is everything. What you think you become. –Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Join the discussion
Source: — Problem Solving |

GMAT/MBA Expert

GMAT Instructor
Posts: 1179
Joined: Sun Apr 11, 2010 9:07 pmFollowed by: 88 members
Location: Milpitas, CA
Thanked: 447 times

by Rahul@gurome » Wed Sep 15, 2010 11:14 pm
7-person committee can be formed in 16C7:16C8 = 16!/(7!)(9!) : 16!/(8!)(8!) = 8/9

The correct answer is [spoiler](D)[/spoiler].
Rahul Lakhani
Quant Expert
Gurome, Inc.
https://www.GuroMe.com
On MBA sabbatical (at ISB) for 2011-12 - will stay active as time permits
1-800-566-4043 (USA)
+91-99201 32411 (India)
Top
Join the discussion
User avatar
Legendary Member
Posts: 866
Joined: Mon Aug 02, 2010 6:46 pm
Location: Gwalior, India
Thanked: 31 times

by goyalsau » Fri Sep 17, 2010 12:18 am
Thanks Rahul to such a short cut i was thinking what could be the best way to solve it.
Nice work you made lengthy calculation very easy..
Top
Join the discussion
Newbie | Next Rank: 10 Posts
Posts: 3
Joined: Tue Sep 21, 2010 10:53 am

by alindawit » Sun May 29, 2011 12:22 am
Hi,

Thanks for the answer, but could you explain how you can quickly get to 8/9? From 16!/7!9! / 16!/8!8! I do not immediately retrieve 8/9....

Thanks!
Top
Join the discussion
Senior | Next Rank: 100 Posts
Posts: 97
Joined: Sun May 15, 2011 9:19 amFollowed by: 1 member
Thanked: 18 times

by SoCan » Sun May 29, 2011 9:37 am
alindawit wrote:Hi,

Thanks for the answer, but could you explain how you can quickly get to 8/9? From 16!/7!9! / 16!/8!8! I do not immediately retrieve 8/9....

Thanks!
I think it's easiest to see when you put the ratio in fraction form and write it out. Hopefully the formatting works out here:

If you put it as a fraction and flip the bottom term to multiply, you get
16! 8!8!
---- * ----
7!9! 16!

Now you can see that the 16!s cancel, the 7! cancels out all terms of 8! except 8, and the other 8! cancels out all the terms of 9! except 9.

EDIT: The formatting doesn't work, but hopefully you get the picture.
Top
Join the discussion