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Source: — Data Sufficiency |
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by NikolayZ » Fri Oct 30, 2009 5:49 am
Hey Gmatgirl !

I think that the answer is C.
First, let's rephrase the question. We get - does S=3r+2?
1)S=3r+2 or S=4r+9 insufficient
2)S=4r-6 or S=3r+2, insufficient
Combining 1 and 2 we get S=3r+2. Sufficient.
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by gmatgirl12 » Fri Oct 30, 2009 4:14 pm
NikolayZ wrote:Hey Gmatgirl !

I think that the answer is C.
First, let's rephrase the question. We get - does S=3r+2?
1)S=3r+2 or S=4r+9 insufficient
2)S=4r-6 or S=3r+2, insufficient
Combining 1 and 2 we get S=3r+2. Sufficient.
Thanks! The answer is C. I chose answer D because I saw that s=3r+2 was in each choice. Except I failed to realized that I had to consider s=4r+9 or s=4r-6. Thanks again!
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