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

Redeem

One possible solution

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 208
Joined: Sun Sep 28, 2008 12:30 pm
Thanked: 22 times

by neoreaves » Sun Mar 28, 2010 2:07 pm
I AGREE ,....answer should be D ...what is the source of the question though ?
Top
Legendary Member
Posts: 941
Joined: Sun Dec 27, 2009 12:28 am
Thanked: 20 times
Followed by:1 members

by bhumika.k.shah » Sun Mar 28, 2010 7:54 pm
OA D

Source MGMAT CAT

I meant to say how is each statement sufficient? My pick was E :(
neoreaves wrote:I AGREE ,....answer should be D ...what is the source of the question though ?
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 208
Joined: Sun Sep 28, 2008 12:30 pm
Thanked: 22 times

by neoreaves » Sun Mar 28, 2010 8:03 pm
we are only asked to find one possible solution ....from the equation there are two

x = -a or x = b

if we can find either one of them then we are done

1) gives us value of a ...so gives us one possible solution so its sufficient

2) similarly gives us one possible solution so sufficient
Top
Legendary Member
Posts: 941
Joined: Sun Dec 27, 2009 12:28 am
Thanked: 20 times
Followed by:1 members

by bhumika.k.shah » Sun Mar 28, 2010 8:06 pm
if a's value is given in statement 1 , we can solve for the first part of the quadratic i.e. (x + a)

But what about the second half ? i.e., (x-b) ?

isn't (x+a)(x-B) a complete quadratic eqn whose answer would depend on a AND b?

neoreaves wrote:we are only asked to find one possible solution ....from the equation there are two

x = -a or x = b

if we can find either one of them then we are done

1) gives us value of a ...so gives us one possible solution so its sufficient

2) similarly gives us one possible solution so sufficient
Top
Master | Next Rank: 500 Posts
Posts: 148
Joined: Tue Jun 09, 2009 11:06 pm
Thanked: 7 times

by pops » Sun Mar 28, 2010 10:03 pm
a quadratic has 2 solutions.. we are asked to find any 1 solution.. so if we know a or b we get one solution.. hence both statements individually answers..
Top
Post new topic Post Reply
• Page 1 of 1