anuptvm wrote:Is M < 0 ?
1. - M = | -M|
2. M^2 =9
According to me Stmt 1 is sufficient
when M = 1; - (1) = |-1| = 1
when M = -1; -(-1) = |1| = 1
when M = 0 ; 0 = 0
So for all values of M; M >= 0 which is sufficient
The OA is C. Could someone explain
modulus is always zero or positive.
Consider first (1) alone.
It means -m => 0.
Or m <= 0.
So m is either 0 or less than 0.
Hence (1) alone is not sufficient.
Next consider (2) alone.
It means m = -3 or 3.
Again not sufficient.
On combining (1) and (2) m = -3 is the only value satisfying both the conditions and it is less than 0.
So both statements together are sufficient.
The correct answer is (C).
