Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 20 May 2013, 01:20
Customize  |  Hide

Search
Register
New posts
Unanswered

A team of 8 students goes on an excursion, in two cars, of

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
CEO
CEO
Joined: 15 Aug 2003
Posts: 3550
Followers: 55

Kudos [?]: 626 [0], given: 781

A team of 8 students goes on an excursion, in two cars, of [#permalink] New post 07 Oct 2003, 20:44
00:00

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
A team of 8 students goes on an excursion, in two cars, of which one can seat 5 and the other only 4. In how many ways can they travel?

1) 9
2) 26
3) 126
4) 3920


please explain
SVP
SVP
User avatar
Joined: 03 Feb 2003
Posts: 1683
Followers: 4

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

 [#permalink] New post 07 Oct 2003, 23:38
8=4+4 => 8C4=70, I would divide 70 by 2 because doubling effecr is here
8=5+3 => 8C5=56

70+56=126
CEO
CEO
Joined: 15 Aug 2003
Posts: 3550
Followers: 55

Kudos [?]: 626 [0], given: 781

Re: PS : Counting Methods ( Two Cars , 8 Students) [#permalink] New post 08 Oct 2003, 17:30
praetorian123 wrote:
A team of 8 students goes on an excursion, in two cars, of which one can seat 5 and the other only 4. In how many ways can they travel?

1) 9
2) 26
3) 126
4) 3920


please explain


we have two cases

1. divide 8 into 5 and 3

# of ways = 8! /(5!*3!) = 56

2. divide 8 into 4 and 4

# of ways = 8! / (4! *4!) = 70

total = > 126

stolyar, i dont think we need to divide the 70 by 2...
for example, if you have ABCD and EFGH ...both of these groups when selected will have unique combinations...

thanks
praetorian
Intern
Intern
Joined: 20 Sep 2003
Posts: 23
Location: NY, NY
Followers: 0

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

 [#permalink] New post 15 Oct 2003, 18:25
if we have one car with 5 spaces and the other with 3 spaces for 8 people, I would you say that there are 70 diferent ways to travel, not 140, right? Because the 3 left from the 5-space car were already counted in the 3-space car.
_________________

Yoda
________________________________
Try not. Do or Not Do, there is no try!

CEO
CEO
Joined: 15 Aug 2003
Posts: 3550
Followers: 55

Kudos [?]: 626 [0], given: 781

 [#permalink] New post 16 Oct 2003, 02:15
Yoda wrote:
if we have one car with 5 spaces and the other with 3 spaces for 8 people, I would you say that there are 70 diferent ways to travel, not 140, right? Because the 3 left from the 5-space car were already counted in the 3-space car.



dont understand what you are trying to say.

do you agree with my answer?
  [#permalink] 16 Oct 2003, 02:15
    Similar topics Author Replies Last post
Similar
Topics:
 New posts There are 8 engineers among the consulting team. A yuefei 3 02 Nov 2007, 14:33
New posts A car dealership sold two cars seekmba 9 29 Aug 2010, 16:40
New posts 1 EXPERTS_POSTS_IN_THIS_TOPIC There are 8 teams in a certain league and each team plays Smita04 4 10 May 2012, 21:45
Popular new posts 3 EXPERTS_POSTS_IN_THIS_TOPIC There are 8 teams in a certain league and each team plays sarb 10 17 Jun 2012, 03:52
New posts 1 A car goes 12 kilometers on a liter of gas when driven at 80 roygush 3 30 Nov 2012, 12:41
Display posts from previous: Sort by

A team of 8 students goes on an excursion, in two cars, of

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma, IanStewart

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com