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Source: — Data Sufficiency |
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by rijul007 » Fri Nov 04, 2011 10:51 am
1
x+y = z

x = z-y
if x is positive,
|x| = z-y

if x is negative,
|x| = y-z

Insufficient

2.
x<0
Insufficient


Combining
|x| =y-z


Option C
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by neelgandham » Fri Nov 04, 2011 11:03 am
is |x| = y-z

(1) x+y = z
=> x = z-y
=> |x| = z-y, if x >0 ; |x| = y-z, if x<0 Insufficient

(2) x<0 Insufficient

(1)+(2)- |x| = y-z, if x<0 Sufficient

IMO: C
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