IMO C
Right to zero in number line means if z and f both are +ve.
1. z*f > 0 then either z and f > 0 or both z and f < 0. So Not Sufficient.
2. z+f > 0 then either z,f > 0 or z>0,f< 0 (say z=3,f=-2). So not sufficient.
Now combine both. if z<0 and f<0 then z+f < 0 but z+f>0 and zf>0. So Sufficient
Number Line Problem
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Source: Beat The GMAT — Data Sufficiency |
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ashokkadam
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Statement 1: z and f are both +ve or both -ve. So z and f could be either to the right or to the left of 0. INSUFFICIENT>.
Statement 2: z and f can be anything except both -ve. INSUFFICIENT.
Together, we can say that z and f are both +ve, hence SUFFICIENT.
C is the answer.
Statement 2: z and f can be anything except both -ve. INSUFFICIENT.
Together, we can say that z and f are both +ve, hence SUFFICIENT.
C is the answer.
vongdn wrote:Are the integers z and f to the right of of 0 on the number line?
(1) the product of z and f is positive.
(2) the sum of z and f is positive.
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