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

It is currently 04 Aug 2015, 08:35
GMAT Club Tests

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

On a certain transatlantic crossing, 20 percent of a ship s

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
VP
VP
avatar
Joined: 22 Nov 2007
Posts: 1104
Followers: 8

Kudos [?]: 231 [0], given: 0

On a certain transatlantic crossing, 20 percent of a ship s [#permalink] New post 06 Jan 2008, 08:06
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

On a certain transatlantic crossing, 20 percent of a ship’s passengers held round-trip tickets and also took their cars abroad the ship. If 60 percent of the passengers with round-trip tickets did not take their cars abroad the ship, what percent of the ship’s passengers held round-trip tickets?

A. 33 1/3%
B. 40%
C. 50%
D. 60%
E. 66 2/3%
Director
Director
User avatar
Joined: 12 Jul 2007
Posts: 862
Followers: 13

Kudos [?]: 226 [0], given: 0

Re: counting & sets [#permalink] New post 06 Jan 2008, 08:28
.20 = 20% of ship's passengers who held RT tickets AND took their cars aboard
.60 = 60% of ship's passengers who held RT tickets AND did NOT take their cars aborad

.20 of total = (1-.6) of RT ticket holders
1/5 of total = 2/5 of RT
Total = 2 RT
RT = 1/2 of total

Answer C

you can think of it this way

1/5 of total = 2/5 of RT this means that 1/10 of total = 1/5 of RT
multiply through by 5 and we get 5/10 of total = RT so 50%
CEO
CEO
User avatar
Joined: 29 Mar 2007
Posts: 2585
Followers: 17

Kudos [?]: 248 [0], given: 0

Re: counting & sets [#permalink] New post 06 Jan 2008, 09:08
marcodonzelli wrote:
On a certain transatlantic crossing, 20 percent of a ship’s passengers held round-trip tickets and also took their cars abroad the ship. If 60 percent of the passengers with round-trip tickets did not take their cars abroad the ship, what percent of the ship’s passengers held round-trip tickets?

A. 33 1/3%
B. 40%
C. 50%
D. 60%
E. 66 2/3%


R NR T
C 20
NC .6x
T x 100

20+.6x=x --> 20=.4x --> 10/4*20=x x=50

Sorry my double set matrix probably won't look right on the post...

C
Re: counting & sets   [#permalink] 06 Jan 2008, 09:08
Display posts from previous: Sort by

On a certain transatlantic crossing, 20 percent of a ship s

  Question banks Downloads My Bookmarks Reviews Important topics  


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®.