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gmatblood: Master | Next Rank: 500 Posts; Posts: 489; Joined: Tue Jul 05, 2011 11:10 amFollowed by: 5 members; Thanked: 28 times

by gmatblood » Fri Nov 04, 2011 10:48 am

If x<0, is y>0
(1) x/y < 0
(2) y-x>0

IMO: D

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Source: Beat The GMAT — Data Sufficiency | Fri Nov 04, 2011 10:48 am

rijul007: Legendary Member; Posts: 588; Joined: Sun Oct 16, 2011 9:42 amFollowed by: 9 members; Location: New Delhi, India; Thanked: 130 times; GMAT Score:720

by rijul007 » Fri Nov 04, 2011 10:55 am

1.
x/y < 0

(negative)/(positive) < 0

Sufficient

2.
y-x >0
x is negative
lets say,
x = -a

y+a > 0

-a+1 < y < + infinity

Insufficient

Option A

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neelgandham: Community Manager; Posts: 1060; Joined: Fri May 13, 2011 6:46 amFollowed by: 52 members; Location: Utrecht, The Netherlands; Thanked: 318 times

by neelgandham » Fri Nov 04, 2011 10:57 am

If x<0, is y>0

(1) x/y < 0

x is negative, x/y is negative => y is positive Sufficient !

(2) y-x>0

y=1, x=-5 => y-x=6 >0
y=-2, x=-5 => y-x=3 >0

So if y-x>0, y can be +ve or -ve Insufficient!

IMO A

Anil Gandham
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