Roland2rule wrote:Is m not equal to n ?
(1) m + n < 0
(2) mn < 0
How will i know the correct statement here?
(1) m + n < 0
Case 1: If, for example, m = n = -2, then m + n = -4 < 0. The answer is No.
Case 2: If, for example, m = -2 and n = -1, then m + n = -3 < 0. The answer is Yes. Insufficient
(2) mn < 0
=> Since m.n < 0, implying negative, one of m and n is positive and the other is negative. This implies that m not equal to n. Sufficient.
The correct answer:
B
Hope this helps!
-Jay
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