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

 It is currently 01 Jul 2016, 22:36

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

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

A fast food company plans to build 4 new restaurants. If

Author Message
Manager
Joined: 21 Mar 2007
Posts: 73
Followers: 1

Kudos [?]: 63 [0], given: 0

A fast food company plans to build 4 new restaurants. If [#permalink]

Show Tags

30 May 2008, 06:16
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

A fast food company plans to build 4 new restaurants. If there are 12 sites that satisfy the company's criteria for location of new restaurants, in how many different ways can the company select the 4 sites needed for the new restaurants if the ordeer of selection does not matter?

A) 48
B) 288
C) 495
D) 990
E) 11880
VP
Joined: 10 Jun 2007
Posts: 1459
Followers: 7

Kudos [?]: 208 [0], given: 0

Show Tags

30 May 2008, 07:43
japped187 wrote:
A fast food company plans to build 4 new restaurants. If there are 12 sites that satisfy the company's criteria for location of new restaurants, in how many different ways can the company select the 4 sites needed for the new restaurants if the ordeer of selection does not matter?

A) 48
B) 288
C) 495
D) 990
E) 11880

12C4 = 12! / 4!(12-4)! = 495
CEO
Joined: 29 Mar 2007
Posts: 2583
Followers: 19

Kudos [?]: 343 [0], given: 0

Show Tags

30 May 2008, 07:49
japped187 wrote:
A fast food company plans to build 4 new restaurants. If there are 12 sites that satisfy the company's criteria for location of new restaurants, in how many different ways can the company select the 4 sites needed for the new restaurants if the ordeer of selection does not matter?

A) 48
B) 288
C) 495
D) 990
E) 11880

Order does NOT matter.

12!/4!8! = 495
Re: Combinatorics   [#permalink] 30 May 2008, 07:49
Display posts from previous: Sort by