GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 16 Oct 2019, 18:10

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.

Close

Request Expert Reply

Confirm Cancel

A committee of three is to be chosen from six. How many unique committ

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58381
A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post 17 Aug 2017, 01:09
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

77% (00:28) correct 23% (00:30) wrong based on 139 sessions

HideShow timer Statistics

Manager
Manager
avatar
B
Joined: 14 Sep 2016
Posts: 126
Re: A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post 17 Aug 2017, 04:15
6C3 = 20

Hence answer = A
Manager
Manager
avatar
B
Joined: 11 Feb 2017
Posts: 182
A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post Updated on: 17 Aug 2017, 12:00
kunalsinghNS wrote:
6C3 = 20

Hence answer = A



is it 20?

6C1 * 5C1 * 4C1 =120

Originally posted by rocko911 on 17 Aug 2017, 09:46.
Last edited by rocko911 on 17 Aug 2017, 12:00, edited 1 time in total.
Current Student
avatar
S
Joined: 21 Mar 2017
Posts: 137
Location: United States
Concentration: Finance, Strategy
GMAT 1: 730 Q47 V42
GPA: 3.66
A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post 17 Aug 2017, 10:54
6 x 5 x 4 = 120 = E

6 members. 3 slots. Members can't be selected multiple times.
Manager
Manager
avatar
B
Joined: 02 Nov 2015
Posts: 163
GMAT 1: 640 Q49 V29
Re: A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post 17 Aug 2017, 11:52
1
Imo it should 6p3... I.e. 120.

Sent from my Lenovo TAB S8-50LC using GMAT Club Forum mobile app
Manager
Manager
avatar
B
Joined: 14 Sep 2016
Posts: 126
A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post Updated on: 17 Aug 2017, 20:15
rocko911 wrote:
kunalsinghNS wrote:
6C3 = 20

Hence answer = A



is it 20?

6C1 * 5C1 * 4C1 =120



What 6*4*3 does that it eliminates the repitations of a member that is selected in the previous slots in the committee but

6C3 tells all possible unique combinations

OA !

Originally posted by kunalsinghNS on 17 Aug 2017, 19:33.
Last edited by kunalsinghNS on 17 Aug 2017, 20:15, edited 1 time in total.
Manager
Manager
avatar
B
Joined: 07 Jun 2017
Posts: 100
Re: A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post 17 Aug 2017, 19:44
Is it 20?
6c3?
how is it 6p3? thanks
Intern
Intern
avatar
Joined: 02 Jul 2017
Posts: 9
Re: A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post 17 Aug 2017, 19:52
Answer is 20
Example take a committee of 2 to be chosen from 4
A,B,C,D be members
Then AB BC CD AD BD AC are the
Unique committees
That is 4C2=6.
Similarly 6C3 there and it is 20../



Sent from my XT1706 using GMAT Club Forum mobile app
Target Test Prep Representative
User avatar
G
Status: Head GMAT Instructor
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2816
Re: A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post 22 Aug 2017, 16:47
Bunuel wrote:
A committee of three is to be chosen from six. How many unique committees result?

(A) 20
(B) 40
(C) 60
(D) 105
(E) 120


Because the order of selection doesn’t matter, this is a combination problem. The number of ways to select 3 people from 6 is 6C3 = 6!/[3!(6-3)!] = (6 x 5 x 4)/3! = (6 x 5 x 4)/(3 x 2) = 20.

Answer: A
_________________

Jeffrey Miller

Head of GMAT Instruction

Jeff@TargetTestPrep.com
TTP - Target Test Prep Logo
122 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

Intern
Intern
avatar
B
Joined: 25 Jan 2013
Posts: 20
Concentration: Marketing, Strategy
GPA: 3.64
GMAT ToolKit User
A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post Updated on: 14 Sep 2017, 06:10
Quote:
A committee of three is to be chosen from six. How many unique committees result?

(A) 20
(B) 40
(C) 60
(D) 105
(E) 120


6*5*4*3!/(3!*3!)= 20
_________________

pressing +1 kudos is a nice way to say thanks


Originally posted by HUNTdGMAT on 23 Aug 2017, 00:00.
Last edited by HUNTdGMAT on 14 Sep 2017, 06:10, edited 2 times in total.
Intern
Intern
avatar
B
Joined: 13 Jul 2017
Posts: 29
Re: A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post 24 Aug 2017, 04:34
6C3
Choice-A
I consider it below 500 Level Question
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 13210
Re: A committee of three is to be chosen from six. How many unique committ  [#permalink]

Show Tags

New post 04 Nov 2018, 07:39
1
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Club Bot
Re: A committee of three is to be chosen from six. How many unique committ   [#permalink] 04 Nov 2018, 07:39
Display posts from previous: Sort by

A committee of three is to be chosen from six. How many unique committ

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne