Delegations : Quant Question Archive [LOCKED]
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

It is currently 18 Jan 2017, 01:18
GMAT Club Tests

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Delegations

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
VP
VP
User avatar
Joined: 06 Feb 2007
Posts: 1023
Followers: 22

Kudos [?]: 178 [0], given: 0

Reviews Badge
Delegations [#permalink]

Show Tags

New post 23 Mar 2007, 11:44
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Please provide your explanations. Does anybody know a book that explains combinatorics/probability concepts well?

Six three-representative delegations attend an international conference. The representatives shake hands when they are introduced to one another. How many handshakes are possible if each delegate shakes hands only once with every other attendant except with those of his/her delegation?

A) 36
B) 72
C) 90
D) 135
E) 388
1 KUDOS received
Manager
Manager
User avatar
Joined: 25 May 2006
Posts: 227
Followers: 1

Kudos [?]: 60 [1] , given: 0

 [#permalink]

Show Tags

New post 23 Mar 2007, 14:52
1
This post received
KUDOS
D) 135

Lets say we got:
AAA BBB CCC DDD EEE FFF

1) For A's: 3*15=45 hand shakes
2) For B's: 3*12=36 hand shakes (excluding hand shake with A bcs it ocurred in 1)
3) For C's: 3*9=27 hand shakes (excluding hand shake with A and B bcs it ocurredin 1 and 2)
4) For D's: 3*6=18 hand shakes (excluding hand shake with A, B and C bcs it ocurred in 1, 2 and 3).
5) For E's: 3*3=9 hand shakes

=45+36+27+18+9=135
_________________

Who is John Galt?

Director
Director
User avatar
Joined: 14 Jan 2007
Posts: 777
Followers: 2

Kudos [?]: 136 [0], given: 0

 [#permalink]

Show Tags

New post 24 Mar 2007, 07:57
My answer is 135.
I agree with X&Y 's explanation.
Manager
Manager
avatar
Joined: 12 Feb 2007
Posts: 167
Followers: 1

Kudos [?]: 1 [0], given: 0

 [#permalink]

Show Tags

New post 24 Mar 2007, 10:20
yes I also believe X&Y is correct, and therefore he may want to double check his answer.
VP
VP
User avatar
Joined: 06 Feb 2007
Posts: 1023
Followers: 22

Kudos [?]: 178 [0], given: 0

Reviews Badge
 [#permalink]

Show Tags

New post 24 Mar 2007, 12:33
The OA is D indeed.
X&Y, great job!
1 KUDOS received
Director
Director
User avatar
Joined: 13 Mar 2007
Posts: 545
Schools: MIT Sloan
Followers: 4

Kudos [?]: 70 [1] , given: 0

 [#permalink]

Show Tags

New post 24 Mar 2007, 21:39
1
This post received
KUDOS
another way to solve it ..

total 18 folks ..

so total handshakes possible = 18c2 = 153

they dont shake hands within the group ..

within the group = 3c2 = 3 handshakes , hence for 6 groups = 18 handshakes

so, req number = 153 - 18 = 135 :)
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 13435
Followers: 575

Kudos [?]: 163 [0], given: 0

Premium Member
Re: Delegations [#permalink]

Show Tags

New post 22 Dec 2016, 09:53
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Re: Delegations   [#permalink] 22 Dec 2016, 09:53
Display posts from previous: Sort by

Delegations

  post reply Question banks Downloads My Bookmarks Reviews Important topics  


cron

GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.