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

It is currently 20 Aug 2014, 06:43

Starting Soon:

Live Q&A Session with Cambridge Admissions Team   ||    Join Chat Room to Attend the Session


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

10% of all-aliens are capable of intelligent thought and

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
1 KUDOS received
Senior Manager
Senior Manager
User avatar
Joined: 22 Dec 2009
Posts: 365
Followers: 10

Kudos [?]: 201 [1] , given: 47

GMAT ToolKit User GMAT Tests User
10% of all-aliens are capable of intelligent thought and [#permalink] New post 14 Feb 2010, 05:31
1
This post received
KUDOS
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

67% (05:12) correct 33% (08:03) wrong based on 9 sessions
10% of all-aliens are capable of intelligent thought and have more than 3 arms, and 75% of aliens with 3 arms or less are capable of intelligent thought. If 40% of all aliens are capable of intelligent thought, what percent of aliens have more than 3 arms?

[Reveal] Spoiler: Answer & Explanation
Ans: 60%
Explanation:
Ques: % of aliens having more than 3 Arms.

Lets the total no of aliens be 100
Form 3 categories: Less than equal to 3 Arms;More than 3 Arms;Intelligent Thoughts
From the ques:
More than 3 Arms & intelligent thoughts = 10% of total Aliens = 10
Let the other aliens which have more than 3 Arms but dont have intelligent thoughts be x

This gives total no of aliens with Less than or equal to 3 Arms (Intelligent or not) = 100 - x - 10 = 90 - x

From the ques:
Aliens having less than or equal to 3 Arms & Intelligent Thoughts = 75% of total no of aliens with Less than or equal to 3 Arms = 0.75 (90 - x)

It's given total no of intelligent Aliens = 40% of all the aliens = 40

Therefore 40 = 10 + 0.75(90-x)
Solve for x... , x = 50

Therefore % of aliens having more than 3 Arms = x + 10 = 60%

_________________

Cheers!
JT...........
If u like my post..... payback in Kudos!! :beer

|Do not post questions with OA|Please underline your SC questions while posting|Try posting the explanation along with your answer choice|
|For CR refer Powerscore CR Bible|For SC refer Manhattan SC Guide|


~~Better Burn Out... Than Fade Away~~

CEO
CEO
User avatar
Status: Nothing comes easy: neither do I want.
Joined: 12 Oct 2009
Posts: 2793
Location: Malaysia
Concentration: Technology, Entrepreneurship
Schools: ISB '15 (M)
GMAT 1: 670 Q49 V31
GMAT 2: 710 Q50 V35
Followers: 178

Kudos [?]: 922 [0], given: 235

GMAT Tests User Reviews Badge
Re: aliens, arms, intelligent [#permalink] New post 14 Feb 2010, 08:32
Let x be the number of aliens with more than 3 arms
Then 100-x with 3 or less than 3 arms

according to the question

75% of (100-x) = 40-10

solving will give x = 60
_________________

Fight for your dreams :For all those who fear from Verbal- lets give it a fight

Money Saved is the Money Earned :)

Jo Bole So Nihaal , Sat Shri Akaal

:thanks Support GMAT Club by putting a GMAT Club badge on your blog/Facebook :thanks

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Gmat test review :
670-to-710-a-long-journey-without-destination-still-happy-141642.html

Manager
Manager
User avatar
Status: Getting ready for the internship summer
Joined: 07 Jun 2009
Posts: 51
Location: Rochester, NY
Schools: Simon
WE 1: JPM - Treasury
Followers: 0

Kudos [?]: 18 [0], given: 23

Re: aliens, arms, intelligent [#permalink] New post 14 Feb 2010, 08:37
I assume 100 aliens:

40 are intelligent:
:30 have arms < 3
:10 have arms >= 3

60 are dumb:
:10 have arms < 3 given the fact that 75% of all aliens with more than three arms are intelligent.
:The remaining aliens have arms >=3 (50)

50 + 10 = 60
Manager
Manager
avatar
Joined: 10 Feb 2010
Posts: 195
Followers: 2

Kudos [?]: 38 [0], given: 6

GMAT Tests User
Re: aliens, arms, intelligent [#permalink] New post 17 Feb 2010, 18:28
The above explanations were better than mine but you can do it this way too :

3arms<x 3arms>x
intell 30% 10% 40%
not in 10% 50% 60%
40% 60%
Intern
Intern
avatar
Joined: 18 Sep 2012
Posts: 1
Followers: 0

Kudos [?]: 0 [0], given: 1

Re: aliens, arms, intelligent [#permalink] New post 24 Oct 2012, 00:49
can someone plz. explain the solution of this question by the method of venn diagram....
Moderator
Moderator
User avatar
Joined: 02 Jul 2012
Posts: 1226
Location: India
Concentration: Strategy
GMAT 1: 740 Q49 V42
GPA: 3.8
WE: Engineering (Energy and Utilities)
Followers: 65

Kudos [?]: 655 [0], given: 116

GMAT Tests User Premium Member
Re: 10% of all-aliens are capable of intelligent thought and [#permalink] New post 24 Oct 2012, 01:48
Drawing a grid would help solve this question very quick

>3 3 or less Total

Intelligent 10 50 60

Dumb 30 10 40

Total 40 60 100
_________________

Did you find this post helpful?... Please let me know through the Kudos button.

Thanks To The Almighty - My GMAT Debrief

GMAT Reading Comprehension: 7 Most Common Passage Types

Director
Director
User avatar
Joined: 22 Mar 2011
Posts: 613
WE: Science (Education)
Followers: 67

Kudos [?]: 498 [0], given: 43

GMAT Tests User
Re: aliens, arms, intelligent [#permalink] New post 24 Oct 2012, 01:51
sheikhaamir wrote:
can someone plz. explain the solution of this question by the method of venn diagram....


See the attached diagram: I denotes intelligent aliens, and m3 denotes those with more than 3 arms.
Among those who don't have more than 3 arms, the ratio between those who are intelligent and those who aren't is 75:25, therefore 3x and x in the diagram.
Knowing that 3x + 10 = 40, it follows that x =10, and from the diagram, those who have more than 3 arms is 100 - 30 - 10 = 60.



Answer: 60%.
Attachments

Aliens-Venn.jpg
Aliens-Venn.jpg [ 17.82 KiB | Viewed 883 times ]


_________________

PhD in Applied Mathematics
Love GMAT Quant questions and running.

Re: aliens, arms, intelligent   [#permalink] 24 Oct 2012, 01:51
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic Until recently, nearly everyone thought of intelligence as a Maksym 1 05 Aug 2014, 10:14
1 Experts publish their posts in the topic Ability vs Capability ameyagmat1989 1 21 May 2014, 23:06
1 Thoughts... thp510 1 03 Nov 2011, 20:10
Intelligence Acc3ss 6 25 Oct 2009, 06:42
Until recently, nearly everyone thought of intelligence as a aaron22197 10 28 Jun 2008, 23:06
Display posts from previous: Sort by

10% of all-aliens are capable of intelligent thought and

  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®.