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

 It is currently 26 Aug 2016, 03:40

### 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

# combination vs permutation

Author Message
TAGS:

### Hide Tags

Manager
Joined: 21 Feb 2010
Posts: 212
Followers: 1

Kudos [?]: 23 [1] , given: 1

### Show Tags

16 Jun 2010, 19:26
1
KUDOS
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

the followings are combination and permutation questions:
1) if seven people board an airport shuttle with only three available seats, how many different seating arrangements are possible?
2) if three of seven standby passengers are selected for a flight, how many different combinations of standby passengers can be selected?

it seems to me that the questions are the same--select 3 people out of a group of 7 people. however, the explanations state that the 1st one is permutation and the 2nd one is combination. how do we know if the order matters when the questions don't explicitly state it? any clarification will be appreciated! Thanks!
Intern
Joined: 06 Apr 2010
Posts: 23
Followers: 2

Kudos [?]: 1 [1] , given: 6

### Show Tags

16 Jun 2010, 19:40
1
KUDOS
The key words are "arrangement", implying "Permutation", and "combinations", implying exactly as it suggests.
In the first case the answer is 7P3 (the seating arrangement matters: ABC and CBA are different).
Wheras in the second case, the answer is 7C3 (the order of choosing doesnt matter: orders ABC and CBA are same).

Hope this helps!
Re: combination vs permutation   [#permalink] 16 Jun 2010, 19:40
Similar topics Replies Last post
Similar
Topics:
2 Permutations and combinations 3 28 Mar 2011, 01:54
combination/permutation 2 26 Dec 2010, 19:30
1 permutation and combinations 3 07 Aug 2010, 06:22
1 Permutations/Combinations... 4 06 Jan 2010, 06:50
Permutation + Combination 4 17 Mar 2009, 21:16
Display posts from previous: Sort by