Find all School-related info fast with the new School-Specific MBA Forum

It is currently 06 May 2015, 00:16

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Two members of a certain club are selected to speak at the next club

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
VP
VP
User avatar
Joined: 30 Jun 2008
Posts: 1048
Followers: 11

Kudos [?]: 348 [0], given: 1

Two members of a certain club are selected to speak at the next club [#permalink] New post 20 Sep 2008, 22:13
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

78% (01:00) correct 22% (02:00) wrong based on 51 sessions
Two members of a certain club are selected to speak at the next club meeting. If there are 36 different possible selections of the 2 club members, how many members does the club have?

A. 5
B. 6
C. 7
D. 8
E. 9
[Reveal] Spoiler: OA

_________________

"You have to find it. No one else can find it for you." - Bjorn Borg


Last edited by Bunuel on 22 Nov 2014, 06:07, edited 1 time in total.
Renamed the topic, edited the question, added the OA and moved to PS forum.
VP
VP
User avatar
Joined: 30 Jun 2008
Posts: 1048
Followers: 11

Kudos [?]: 348 [0], given: 1

Re: Two members of a certain club are selected to speak at the next club [#permalink] New post 20 Sep 2008, 23:46
1
This post was
BOOKMARKED
I did it this way.

we know total number of ways of selecting 2 People out of n people is nC2 = 36(given in the question)

ie n!/(2!*(n-2)!) = [n(n-1)*(n-2)!] / [(2!*(n-2)!)] = n(n-1)/2

so n(n-1)/2=36
n(n-1)=72
we know 72 = 9*8

so n=9

is the approach right ?
_________________

"You have to find it. No one else can find it for you." - Bjorn Borg

SVP
SVP
avatar
Joined: 17 Jun 2008
Posts: 1573
Followers: 12

Kudos [?]: 202 [0], given: 0

Re: Two members of a certain club are selected to speak at the next club [#permalink] New post 22 Sep 2008, 00:52
amitdgr wrote:
I did it this way.

we know total number of ways of selecting 2 People out of n people is nC2 = 36(given in the question)

ie n!/(2!*(n-2)!) = [n(n-1)*(n-2)!] / [(2!*(n-2)!)] = n(n-1)/2

so n(n-1)/2=36
n(n-1)=72
we know 72 = 9*8

so n=9

is the approach right ?


I used exactly the same approach.
Manager
Manager
User avatar
Joined: 04 Jul 2014
Posts: 130
Concentration: General Management, Strategy
GMAT 1: 640 Q47 V31
GMAT 2: 640 Q44 V34
GMAT 3: 710 Q49 V37
GPA: 3.58
WE: Analyst (Accounting)
Followers: 7

Kudos [?]: 79 [0], given: 304

Re: Two members of a certain club are selected to speak at the next club [#permalink] New post 22 Nov 2014, 02:54
I used the same approach too. Don't see another way. Do you have an OA/OE?
_________________

Cheers!!

Joseph
If you like my post, let me know. Give me a kudos! :) Check these out too. You might like them! :)
GMAT Debrief | Comprehensive Verbal Flash cards/Notes | How to prepare your recommenders best | How to boost/ace SC score sustainbly |

Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 27228
Followers: 4231

Kudos [?]: 41112 [1] , given: 5666

Re: Two members of a certain club are selected to speak at the next club [#permalink] New post 22 Nov 2014, 06:10
1
This post received
KUDOS
Expert's post
joseph0alexander wrote:
I used the same approach too. Don't see another way. Do you have an OA/OE?


Solution above is correct. Similar question to practice: two-members-of-a-club-are-to-be-selected-to-represent-the-132340.html
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

GMAT Club Premium Membership - big benefits and savings

Re: Two members of a certain club are selected to speak at the next club   [#permalink] 22 Nov 2014, 06:10
    Similar topics Author Replies Last post
Similar
Topics:
2 Experts publish their posts in the topic Two members of a club are to be selected to represent the arnijon90 3 10 May 2012, 07:15
The members of a club were asked whether they speak marcodonzelli 0 22 Nov 2014, 03:15
4 The members of a club were asked whether they speak kevincan 17 05 Aug 2007, 03:32
Two members of a club are to be selected to represent the g1m2a3t406 2 24 Oct 2006, 16:16
Two members of a club are to be selected to represent the alimad 6 17 Sep 2006, 16:22
Display posts from previous: Sort by

Two members of a certain club are selected to speak at the next club

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| 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®.