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

 It is currently 06 Oct 2015, 08:26

Happening Now:

Interview Invitations for Harvard R1 Applicants | Join GMAT Club Chat Room to updates

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

Anyone Can Help Me Understand This Problem?

Author Message
TAGS:
Intern
Joined: 25 Nov 2010
Posts: 13
Followers: 0

Kudos [?]: 1 [0], given: 2

Anyone Can Help Me Understand This Problem? [#permalink]  05 Dec 2010, 18:08
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Hello Everybody,

I am new to this forum and I hope I am posting this problem in the right place. I would really appreciate it if anyone could help me to solve this problem and understand similar questions.

-If a club has 10 member and 3 are to be chosen to be delegates to a conference, what is the probability that Sara, a member of the club be one of the delegates?
Retired Moderator
Joined: 02 Sep 2010
Posts: 805
Location: London
Followers: 87

Kudos [?]: 658 [1] , given: 25

Re: Anyone Can Help Me Understand This Problem? [#permalink]  05 Dec 2010, 19:28
1
KUDOS
kevinfa wrote:
Hello Everybody,

I am new to this forum and I hope I am posting this problem in the right place. I would really appreciate it if anyone could help me to solve this problem and understand similar questions.

-If a club has 10 member and 3 are to be chosen to be delegates to a conference, what is the probability that Sara, a member of the club be one of the delegates?

The probability = (No of committees that include Sara) / (Total no of possible committess)

No of committess that include Sara = Ways to select 2 delegates from the other 9 members = C(9,2) = 36
Total no of possible committees = Ways to select 3 delegates from 10 members = C(10,3) = 120

Probability = 36/120 = 0.3
_________________
Intern
Joined: 25 Nov 2010
Posts: 13
Followers: 0

Kudos [?]: 1 [0], given: 2

Re: Anyone Can Help Me Understand This Problem? [#permalink]  05 Dec 2010, 19:31
Thanks a lot. I understand now!
Re: Anyone Can Help Me Understand This Problem?   [#permalink] 05 Dec 2010, 19:31
Similar topics Replies Last post
Similar
Topics:
1 Problem with number properties question - can anyone help? 16 30 Mar 2011, 01:09
simple ps problems...can anyone help 1 10 Feb 2011, 05:04
Can anyone explain to me ? 5 18 Jun 2010, 07:38
2 Some difficult problems (for me :)) anyone can help? 7 01 Jan 2010, 23:10
Display posts from previous: Sort by