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adwaitkasbekar
- Junior | Next Rank: 30 Posts
- Posts: 16
- Joined: Sun Nov 14, 2010 11:01 pm
Statement 1: (x + y) = zadwaitkasbekar wrote:Is |x| = y - z?
1) x + y = z
2) x < 0
Implies, x = z - y
Now, if x ≥ 0, |x| = x = (z - y)
But, if x < 0, |x| = -x = -(z - y) = (y - z)
Not sufficient
Statement 2: x < 0
No information about y and z
Not sufficient
1 & 2 Together: As x < 0, |x| = -x = -(z - y) = (y - z)
Sufficient
The correct answer is C.
