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

It is currently 22 Oct 2014, 21:29

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

basic permutation vs. combination

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 02 Jan 2011
Posts: 7
Followers: 0

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

basic permutation vs. combination [#permalink] New post 16 Jan 2011, 07:37
I'm looking at kaplan premier at the permutation review section, and the example is how many ways can you arrange the letters in the word ASCENT.

I'm not understanding why this is a permutation and not a combinations problem. Overall, I'm having a hard time differentiating between combinations and permutations. I understand the order matters, but I don't see why here.

It says "clearly the order matters here, since ASCENT is different than TNESCSA." Right, but then if you don't want to change the order how could you rearrange the letters? Any advice or clarity would be greatly appreciated.
Kaplan GMAT Prep Discount CodesKnewton GMAT Discount CodesGMAT Pill GMAT Discount Codes
1 KUDOS received
Intern
Intern
avatar
Joined: 31 Aug 2009
Posts: 27
Followers: 2

Kudos [?]: 18 [1] , given: 45

Re: basic permutation vs. combination [#permalink] New post 16 Jan 2011, 09:27
1
This post received
KUDOS
Hi,
Keeping it simple.
A combination is simply a choice of objects, while a permutation is a rearrangement or (sometimes, a re-alignment) of the choice of objects.
Arranging letters involves permutation, while selection of letters involves combination.
For example taking your example
How many ways can you arrange the letters in the word ASCENT?
Here we need to arrange letters and hence permutation is involved
How many 3 different letter words can be formed out of the five letters A,E,I,O,U?
Here we need to select 3 letters out of 5 and no arrangement is required. Hence it is combination.
Hope this helps

Thanks and Regards,
Sashikanth
Re: basic permutation vs. combination   [#permalink] 16 Jan 2011, 09:27
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic Permutation and Combination Basic Question ??????? shagalo 2 16 Aug 2014, 01:34
Experts publish their posts in the topic Combinations vs Permutations Compendium? manimgoindowndown 2 25 Jan 2013, 04:50
2 combination vs permutation tt11234 1 16 Jun 2010, 18:26
Basics on Permutation and Combinations lavanya_25 1 20 Dec 2004, 09:26
Display posts from previous: Sort by

basic permutation vs. combination

  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®.