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

Redeem

how many own a car?

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Community Manager
Posts: 1537
Joined: Mon Aug 10, 2009 6:10 pm
Thanked: 653 times
Followed by:252 members

how many own a car?

by papgust » Sun Feb 28, 2010 6:19 am
In a group of 80 college students, how many own a car?

(1) Of the students who do not own a car, 14 are male.
(2) Of the students who own a car, 42% are female.

OA: B
Source: Magoosh.com

I don't understand how statement II is sufficient. Please explain!
Top
Source: — Data Sufficiency |
Master | Next Rank: 500 Posts
Posts: 189
Joined: Thu Apr 03, 2008 2:03 pm
Location: USA
Thanked: 21 times

by rohan_vus » Sun Feb 28, 2010 6:49 am
Stmnt II tells that females who own a car is 42% of students owing a car

Let students owning a car be x , so females who own a car is 42% of x = (21/50)*x

Now (21/50)*x got to be an integer as its actual no of females who own a car , which means x must be divisible by 50 , so x could be 50 , 100 , etc
But total no of students = 80 , so x is 50 -- Hence sufficient
Last edited by rohan_vus on Sun Feb 28, 2010 7:04 am, edited 1 time in total.
Top
Legendary Member
Posts: 610
Joined: Fri Jan 15, 2010 12:33 am
Thanked: 47 times
Followed by:2 members

by kstv » Sun Feb 28, 2010 7:03 am
Awesome!!
Top
Post new topic Post Reply
• Page 1 of 1