gmat prep
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Q is are Z,f >0?
I. zf>0 This condition is satisfied if z & f >0 pr if both are <0>0
Assume Z=99, F = -1, Z+F >0 but f<0>0 or if both are <0>0 hence both >0. Answer is c.
I. zf>0 This condition is satisfied if z & f >0 pr if both are <0>0
Assume Z=99, F = -1, Z+F >0 but f<0>0 or if both are <0>0 hence both >0. Answer is c.