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

 It is currently 29 Mar 2015, 15:49

# Update:

New questions posted on the CR forum and SC forum. Answer + Explanation = Kudos

### 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

# A certain roller coaster has 3 cars, and a passenger is

Author Message
TAGS:
Manager
Joined: 30 Jan 2006
Posts: 64
Followers: 1

Kudos [?]: 5 [0], given: 0

A certain roller coaster has 3 cars, and a passenger is [#permalink]  07 Aug 2007, 12:09
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the
3 cars each time that passenger rides the roller coaster. If a certain passenger is to ride
the roller coaster 3 times, what is the probability that the passenger will ride in each of
the 3 cars?
A. 0
B. 1/9
C. 2/9
D. 1/3
E. 1
Senior Manager
Joined: 24 Nov 2006
Posts: 351
Followers: 1

Kudos [?]: 14 [0], given: 0

Re: DS...Roller Coaster [#permalink]  07 Aug 2007, 12:59
smily_buddy wrote:
A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the
3 cars each time that passenger rides the roller coaster. If a certain passenger is to ride
the roller coaster 3 times, what is the probability that the passenger will ride in each of
the 3 cars?
A. 0
B. 1/9
C. 2/9
D. 1/3
E. 1

Probab to ride in any of the cars: 1/3.

Cars: A, B, C.

Number of possible rides: number of combinations of A, B, C where no letter (car) is repeated = 3! = 6.

Total number of possible rides = 3x3x3 = 27.

Probab = 6/27.
VP
Joined: 10 Jun 2007
Posts: 1465
Followers: 6

Kudos [?]: 128 [0], given: 0

Re: DS...Roller Coaster [#permalink]  07 Aug 2007, 13:13
smily_buddy wrote:
A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the
3 cars each time that passenger rides the roller coaster. If a certain passenger is to ride
the roller coaster 3 times, what is the probability that the passenger will ride in each of
the 3 cars?
A. 0
B. 1/9
C. 2/9
D. 1/3
E. 1

C.
First pick is any
Second pick is 2/3
Third pick is 1/3
2/3 * 1/3 = 2/9.
Manager
Joined: 30 Jan 2006
Posts: 64
Followers: 1

Kudos [?]: 5 [0], given: 0

Great the OA is C...
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5079
Location: Singapore
Followers: 21

Kudos [?]: 180 [0], given: 0

First time -> choice of any 3 cars
second time -> choice of any 2 cars
Third time -> choice of 1 car

Total number of ways for passenger to ride in each of 3 cars = 6
Total number of ways a passenger can ride (over 3 rounds) = 27

P = 6/27 = 2/9
Similar topics Replies Last post
Similar
Topics:
A certain roller coaster has 3 cars, and a passenger is 1 15 Oct 2007, 22:32
A certain roller coaster has 3 cars, and a passenger is 9 30 Aug 2007, 02:39
A certain roller coaster has 3 cars, and a passenger is 6 06 Feb 2006, 16:45
6 A certain roller coaster has 3 cars, and a passenger is 4 13 Oct 2005, 12:49
A certain roller coaster has 3 cars, and a passenger is 2 27 Sep 2005, 06:41
Display posts from previous: Sort by