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

It is currently 23 Oct 2014, 05:24

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

Q13: How many different 6-letter sequences are there that

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
SVP
SVP
User avatar
Joined: 28 May 2005
Posts: 1743
Location: Dhaka
Followers: 6

Kudos [?]: 47 [0], given: 0

Q13: How many different 6-letter sequences are there that [#permalink] New post 22 Oct 2005, 05:00
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

100% (01:36) correct 0% (00:00) wrong based on 0 sessions
Q13:
How many different 6-letter sequences are there that consist of 1 A, 2 B’s, and 3 C’s ?
A. 6
B. 60
C. 120
D. 360
E. 720
_________________

hey ya......

SVP
SVP
User avatar
Joined: 28 May 2005
Posts: 1743
Location: Dhaka
Followers: 6

Kudos [?]: 47 [0], given: 0

 [#permalink] New post 22 Oct 2005, 08:45
are both the method correct or one is wrong?
_________________

hey ya......

Director
Director
avatar
Joined: 21 Aug 2005
Posts: 795
Followers: 2

Kudos [?]: 7 [0], given: 0

 [#permalink] New post 22 Oct 2005, 09:58
nakib77, both are correct.
1) Consider each letter seperately,
- There is 1 A, we have 6 places to put this in - 6C1
- There are 2 B's, we have 5 places for this - 5C2
- There are 3 C's, we have 3 places - 3C3
Total possible = 6C1*5C2*3C3 = 6*10*1 = 60 ways

2) Consider all the letters together,
Total possible arrangement for 6 unique letters - 6!
Since all are not unique here - We have 3 C's and 2 B's,
It is 6!/2!3!
  [#permalink] 22 Oct 2005, 09:58
    Similar topics Author Replies Last post
Similar
Topics:
1 Experts publish their posts in the topic How many different ways...? phuongkhanh21 6 25 Mar 2011, 14:12
5 Experts publish their posts in the topic How many different 6-letter sequences are there that consist testprep2010 8 28 Jun 2010, 09:48
3 Experts publish their posts in the topic If 6 coins are tossed, how many different coin sequences marcodonzelli 9 07 Feb 2008, 11:57
Given the 6 letter word SQUARE, how many permutations are bmwhype2 9 28 Nov 2007, 13:30
There are 6 letters and 2 of them are the same. How many getzgetzu 5 06 May 2006, 04:09
Display posts from previous: Sort by

Q13: How many different 6-letter sequences are there that

  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®.