Gmat_mission wrote:Is wp + st > 0?
(1) ws + pt > 0
(2) wt + ps > 0
Statements combined:
Try to satisfy both statements while making wp POSITIVE.
Case 1: w=p=s=t=1, with the result that ws + pt = ws + pt = (1*1) + (1*1) = 2 and that wt + ps = (1*1) + (1*1) = 2
In this case, wp + st = (1*1) + (1*1) = 2, so the answer to the question stem is YES.
Try to satisfy both statements while making wp NEGATIVE.
Case 2: w=-1, p=10, s=1, and t=1, with the result ws + pt = (-1*1) + (10*1) = 9 and that wt + ps = (-1*1) + (10*1) = 9
In this case, wp + st = (-1*10) + (1*1) = -9, so the answer to the question stem is NO.
Since the answer is YES in Case 1 but NO in Case 2, the two statements combined are INSUFFICIENT.
The correct answer is
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