Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 25 May 2017, 05:10

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# PS GMAT prep combinations

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Manager
Joined: 19 Oct 2008
Posts: 94
Followers: 1

Kudos [?]: 45 [0], given: 0

PS GMAT prep combinations [#permalink]

### Show Tags

26 Mar 2009, 10:56
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

From a group of 21 astronauts that includes people with previous experience in space flight, a 3 person crew is to be selected so that exactly 1 person in the crew has previous experience in flight. How many different crews are possible.

A) 432
B) 594
C) 864
D) 1,330
E) 7,982
Senior Manager
Joined: 16 Jan 2009
Posts: 359
Concentration: Technology, Marketing
GMAT 1: 700 Q50 V34
GPA: 3
WE: Sales (Telecommunications)
Followers: 4

Kudos [?]: 212 [0], given: 16

Re: PS GMAT prep combinations [#permalink]

### Show Tags

26 Mar 2009, 12:36
dont you think this question is incorrect , no information has been provided regarding th people with previous experience in space flight.

forgive me if i have missed anything.
_________________

Lahoosaher

Manager
Joined: 19 Oct 2008
Posts: 94
Followers: 1

Kudos [?]: 45 [0], given: 0

Re: PS GMAT prep combinations [#permalink]

### Show Tags

26 Mar 2009, 14:17
My mistake in typing:

There are 12 people with previous experience in space flight.

Sorry about that.
SVP
Joined: 28 Dec 2005
Posts: 1561
Followers: 3

Kudos [?]: 158 [0], given: 2

Re: PS GMAT prep combinations [#permalink]

### Show Tags

26 Mar 2009, 19:14
So then it should be 432, right ? (12C1)*(9C2) ?
Senior Manager
Joined: 16 Jan 2009
Posts: 359
Concentration: Technology, Marketing
GMAT 1: 700 Q50 V34
GPA: 3
WE: Sales (Telecommunications)
Followers: 4

Kudos [?]: 212 [0], given: 16

Re: PS GMAT prep combinations [#permalink]

### Show Tags

27 Mar 2009, 03:10
=(12C1)*(9C2)

Answer : A
_________________

Lahoosaher

Manager
Joined: 19 Aug 2006
Posts: 242
Followers: 2

Kudos [?]: 11 [0], given: 0

Re: PS GMAT prep combinations [#permalink]

### Show Tags

27 Mar 2009, 21:40
Accountant wrote:
From a group of 21 astronauts that includes people with previous experience in space flight, a 3 person crew is to be selected so that exactly 1 person in the crew has previous experience in flight. How many different crews are possible.

A) 432
B) 594
C) 864
D) 1,330
E) 7,982

It should be A.

9!/7!2! * 12!/11!= 432.
Re: PS GMAT prep combinations   [#permalink] 27 Mar 2009, 21:40
Display posts from previous: Sort by

# PS GMAT prep combinations

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 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®.