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

Redeem

DS...help

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 61
Joined: Mon Jul 11, 2011 3:24 am
Followed by:2 members

DS...help

by kriti87 » Sat Jul 30, 2011 7:04 pm
Is x > y?

1) xy > y^2

2) x(y^2) > y^3


I cannot understand why the answer to this DS question is B.



Please help.
Top
Source: — Data Sufficiency |
Senior | Next Rank: 100 Posts
Posts: 49
Joined: Sun Jun 26, 2011 5:45 pm
Thanked: 2 times

by edge » Sat Jul 30, 2011 7:30 pm
In the future, please use spoiler tags to hide the original answer.

St1 is insufficient because the inequality may be different depending upon the sign of y.
St2 is sufficient because y^2 will always be positive, so both sides of the inequality can be divided by y^2 while preserving the inequality. i.e., x > y.

Therefore, the answer is B.
Top
Post new topic Post Reply
• Page 1 of 1