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Source: — Data Sufficiency |

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by Anurag@Gurome » Sat Jan 21, 2012 10:01 pm
sud21 wrote:n+k=0?
1) nk=0
2) n-k=0
Statement 1: Either n or k or both are zero.
If either n or k is equal to zero, (n + k) ≠ 0
If both are equal to zero, (n + k) = 0

Not sufficient

Statement 2: n is equal to k.
If n = k = 0, (n + k) = 0
If n = k ≠ 0, (n + k) ≠ 0

Not sufficient

1 & 2 Together: n = k = 0
Hence, (n + k) = 0

Sufficient

The correct answer is C.
Anurag Mairal, Ph.D., MBA
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