BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

%

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Junior | Next Rank: 30 Posts
Posts: 23
Joined: Mon Mar 26, 2007 7:28 pm
Location: California
by jkwan » Thu Feb 05, 2009 10:09 pm
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%
Manhattan GMAT Adapative CAT (Taken Jan. 19, 09): 600 (Q-42, V-32)

Manhattan GMAT Adapative CAT (Taken Feb. 14, 09): 620 (Q-43, V-32)

GMATPrep CAT (Taken Feb 28, 09): 590 (Q-39, V-34)

Manhattan GMAT Adaptive CAT (Taken March 6, 09): 640 (Q-44, V-34)

800Score CAT (Taken March 14, 09): 630 (Q-41, V-36)

800score CAT (Taken March 20, 09): 600 (Q-41, V-31)

Manhattan GMAT Adaptive CAT (Taken March 22, 09): 600 (Q-39, V-34)

GMATPrep CAT (Taken March 28, 09): 570 (Q-37, V-31)

Knewton Diagnostic CAT (Taken April 3, 09): 640 (Q-45, V-33)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
User avatar
Site Admin
Posts: 2567
Joined: Thu Jan 01, 2009 10:05 amFollowed by: 550 members
Thanked: 712 times
GMAT Score:770

by DanaJ » Thu Feb 05, 2009 11:04 pm
You've got four groups here:
people with round trip tickets and cars = a
people with round trip tickets but no cars = b
people with cars but no round trip tickets = c
people with neither round trip tickets nor cars = d
a + b + c + d = t (total).

Now, you also have that a = 20%of t or that a = 0.2t
And again you have that 60% of a + b (people with round trip tickets) = b, meaning that 0.6(a + b) = b.
Now, what you are looking for is how much of t is (a+b).

Let's use what we have:
0.6 (a + b) = b
0.6a + 0.6b = b
0.6a = 0.4b
3a = 2b
b = 3a/2. Now replace a = 0.2t over here and you get that b = 0.3t.
Then add a and b and you get a + b = 0.2t + 0.3t = 0.5t or 50% of t.

IMHO answer is C[/spoiler]
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
MBA Student
Posts: 1194
Joined: Sat Aug 16, 2008 9:42 pmFollowed by: 17 members
Location: Paris, France
Thanked: 71 times
GMAT Score:710

ShortCut

by gmat740 » Mon Feb 16, 2009 11:52 pm
Bingo!!
I have a trick for this prob:

20% of Ship Passenger(S) = C(cars) + Round-Ticket (R)
20% of S = C + R

60% R with no cars, so 40% R with Cars.

thus,

40% R = 20% S

1% R = 20/40 % S = 0.5% S


So, 100% R = 50% Of Ship Passenger
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 38
Joined: Mon Oct 06, 2008 5:21 am

by marouan » Tue Feb 17, 2009 5:35 am
Good job GMAT 740,
me too usualy I use the same starategy and it's easy if you draw it like that..you will reach :
20% S = 40% R
so R= 50% S.
Attachments
percentage.JPG
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1