=> '31', 'ruid' => '73391', 'username' => 'Bunuel', ), ); ?> Of 220 stamps in a certain stamp collection, exactly 60 were : GMAT Quantitative Section
Find all School-related info fast with the new School-Specific MBA Forum

It is currently 21 Oct 2014, 04:08

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

Of 220 stamps in a certain stamp collection, exactly 60 were

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Eternal Intern
User avatar
Joined: 07 Jun 2003
Posts: 479
Location: Lone Star State
Followers: 1

Kudos [?]: 20 [0], given: 0

Of 220 stamps in a certain stamp collection, exactly 60 were [#permalink] New post 15 Jul 2003, 19:35
:evil:

Of 220 stamps in a certain stamp collection, exactly 60 were U.S. Stamps and 110 were canceled. If 60 percent of the U.S. stamps were canceled, how many of the stamps were both not U.S. stamps and not canceled?

Idiots choose 50 and go to hell during GMAT! :twisted:
Kaplan GMAT Prep Discount CodesKnewton GMAT Discount CodesManhattan GMAT Discount Codes
Director
Director
avatar
Joined: 03 Jul 2003
Posts: 656
Followers: 2

Kudos [?]: 15 [0], given: 0

 [#permalink] New post 15 Jul 2003, 19:46
My Ans: 86
Is it correct?
Eternal Intern
User avatar
Joined: 07 Jun 2003
Posts: 479
Location: Lone Star State
Followers: 1

Kudos [?]: 20 [0], given: 0

 [#permalink] New post 15 Jul 2003, 19:47
Well, I need the explanations!! Please posting answers doesn't help anyone we need reasoning and rationale!

8-)
Manager
Manager
User avatar
Joined: 18 Jun 2003
Posts: 142
Location: Hockeytown
Followers: 1

Kudos [?]: 13 [0], given: 0

 [#permalink] New post 15 Jul 2003, 20:36
Draw a matrix with US/Non-US on one axis, Cancel/Non-Cancel on the other.

You have a 2x2 (4 sections):
1. US, Cancel
2. US, non-Cancel
3. non-US, Cancel
4. non-US, non-Cancel [what the question asks for]

[1+3] = 110. [1+2] = 60. 60% of [1+2] are cancelled, so 60% of 60 are cancelled. So 36 US are cancelled. So [1] = 36.

Since [1] = 36 and [1+3] = 110, [3] = 110-36 = 74.
Since [1] = 36 and [1+2] = 60, [2] = 24.

Now you have [1], [2], and [3], but the question asks for [4].

220 - [1] - [2] - [3] = [4]
220 - 36 - 24 - 74 = 86
SVP
SVP
User avatar
Joined: 03 Feb 2003
Posts: 1613
Followers: 6

Kudos [?]: 52 [0], given: 0

 [#permalink] New post 15 Jul 2003, 21:40
draw a chart -- all will be clear
Eternal Intern
User avatar
Joined: 07 Jun 2003
Posts: 479
Location: Lone Star State
Followers: 1

Kudos [?]: 20 [0], given: 0

That is definitely the clearest way [#permalink] New post 16 Jul 2003, 04:34
Easiest way is J.P.'s , that's the best way, you deserve a pat on the back for that.

Another way:

1) Start with 220
2) Subtract total U.S. 60

3) 36 cancel, U.S. 24 U.S.
4) 74 cancel, non U.S. 36 U.S. canceled

The devil's trap is 50 if your not looking. This happens because you subtract out 36 twice. You cannot do this in Venn diagrams.
That is definitely the clearest way   [#permalink] 16 Jul 2003, 04:34
    Similar topics Author Replies Last post
Similar
Topics:
stamps haichao 2 11 Dec 2008, 17:36
1 stamps amychen77 7 17 Oct 2008, 09:20
stamps lan583 2 18 Oct 2006, 15:15
The number of stamps that Kaye and Alberto had were in the rigger 8 27 Oct 2005, 12:02
THe # of stamps that Kim and Andy had were in the ration Jennif102 11 10 Oct 2005, 07:07
Display posts from previous: Sort by

Of 220 stamps in a certain stamp collection, exactly 60 were

  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®.