• NEW! FREE Beat The GMAT Quizzes
Hundreds of Questions Highly Detailed Reporting Expert Explanations
• 7 CATs FREE!
If you earn 100 Forum Points

Engage in the Beat The GMAT forums to earn
100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## A dance team with 5 members will perform, 2 dancers at a tagged by: BTGmoderatorLU ##### This topic has 1 expert reply and 2 member replies ### Top Member ## A dance team with 5 members will perform, 2 dancers at a ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult Source: Princeton Review A dance team with 5 members will perform, 2 dancers at a time, until all the possible combinations of dancers have performed. If each combination dances for 5 minutes, and there are no breaks or interruptions, what is the total running time of the performance? A. 80 minutes B. 75 minutes C. 60 minutes D. 50 minutes E. 45 minutes The OA is D ### Top Member Legendary Member Joined 29 Oct 2017 Posted: 965 messages Followed by: 4 members Total combinations 5c2 = 10 and each set performs for 5 minutes So, total time ; 10*5 = 50. ### GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2801 messages Followed by: 18 members Upvotes: 43 BTGmoderatorLU wrote: Source: Princeton Review A dance team with 5 members will perform, 2 dancers at a time, until all the possible combinations of dancers have performed. If each combination dances for 5 minutes, and there are no breaks or interruptions, what is the total running time of the performance? A. 80 minutes B. 75 minutes C. 60 minutes D. 50 minutes E. 45 minutes The OA is D The number of combinations of dancers is 5C2 = (5 x 4)/2! = 10 and therefore the total running time of the performance is 10 x 5 = 50 minutes. Answer: D _________________ Scott Woodbury-Stewart Founder and CEO scott@targettestprep.com See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews ### Top Member Legendary Member Joined 02 Mar 2018 Posted: 1104 messages Followed by: 2 members 5 members with 2 dancers at a time; $$Possible\ combination=5_{C_2}=\frac{5\cdot4}{2\cdot1}=\frac{20}{2}=10 ways$$ $$The\ the\ total\ runtime\ of\ 5\ \min utes\ per\ 10\ ways\ =\ 5\cdot10=50\ \min utes\ \ \ \ \ \left(option\ D\right)$$ • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • Magoosh Study with Magoosh GMAT prep Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • 1 Hour Free BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • 5 Day FREE Trial Study Smarter, Not Harder Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

Available with Beat the GMAT members only code

• Award-winning private GMAT tutoring
Register now and save up to \$200

Available with Beat the GMAT members only code

• Free Practice Test & Review
How would you score if you took the GMAT

Available with Beat the GMAT members only code

### Top First Responders*

1 Ian Stewart 53 first replies
2 Brent@GMATPrepNow 36 first replies
3 Jay@ManhattanReview 29 first replies
4 GMATGuruNY 25 first replies
5 ceilidh.erickson 15 first replies
* Only counts replies to topics started in last 30 days
See More Top Beat The GMAT Members

### Most Active Experts

1 Scott@TargetTestPrep

Target Test Prep

199 posts
2 Max@Math Revolution

Math Revolution

90 posts
3 Brent@GMATPrepNow

GMAT Prep Now Teacher

76 posts
4 Ian Stewart

GMATiX Teacher

62 posts
5 GMATGuruNY

The Princeton Review Teacher

44 posts
See More Top Beat The GMAT Experts