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

 It is currently 04 Jul 2015, 08:44

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

lets say you have the word M-I-S-S whats a quick way to

Author Message
TAGS:
Current Student
Joined: 31 Aug 2007
Posts: 371
Followers: 1

Kudos [?]: 63 [0], given: 1

lets say you have the word M-I-S-S whats a quick way to [#permalink]  02 Apr 2008, 09:55
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
lets say you have the word M-I-S-S
whats a quick way to determine the number of combinations of two letters you can create?

Simple combination formula would suggest 4C2, which is 6, but this is not the case since there are two S's, so the actual number of combos is 4:
MI, MS, SS, IS
SVP
Joined: 29 Aug 2007
Posts: 2493
Followers: 59

Kudos [?]: 576 [0], given: 19

Re: PS counting [#permalink]  02 Apr 2008, 12:30
young_gun wrote:
lets say you have the word M-I-S-S
whats a quick way to determine the number of combinations of two letters you can create?

Simple combination formula would suggest 4C2, which is 6, but this is not the case since there are two S's, so the actual number of combos is 4:
MI, MS, SS, IS

total = 4c2 = 6
repetation = 2
so actual = 6 - 2 = 4
_________________
Current Student
Joined: 31 Aug 2007
Posts: 371
Followers: 1

Kudos [?]: 63 [0], given: 1

Re: PS counting [#permalink]  02 Apr 2008, 15:09
GMAT TIGER wrote:
young_gun wrote:
lets say you have the word M-I-S-S
whats a quick way to determine the number of combinations of two letters you can create?

Simple combination formula would suggest 4C2, which is 6, but this is not the case since there are two S's, so the actual number of combos is 4:
MI, MS, SS, IS

total = 4c2 = 6
repetation = 2
so actual = 6 - 2 = 4

could you explain this part more:
repetation = 2
so actual = 6 - 2 = 4

What if the word contained more letters? say: ABCDDDEFGHHH?
Then how many unique combinations?
Thanks!
Re: PS counting   [#permalink] 02 Apr 2008, 15:09
Similar topics Replies Last post
Similar
Topics:
Does anyone have a quick way of approaching this problem? 1 15 May 2008, 19:02
2 PS:quick way to solve ? 4 23 Apr 2008, 22:28
In how many ways can you arrange the word INDEPENDENCE such 4 17 Jul 2007, 08:07
Ok, what's the quick way to do this? 1001^2 - 999^2 2 30 Apr 2006, 20:34
Display posts from previous: Sort by