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Source: — Data Sufficiency |
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imo

by xcusemeplz2009 » Mon Sep 14, 2009 8:00 pm
IMO E
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by GambitOS » Mon Sep 14, 2009 10:21 pm
Please explain me.
We need to SOLVE this problem (so it will be E) or to find have we ENOUGH INFORMATION to solve it (in this cause C, because pqr must be with "minus")?
Great thanks!
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by viju9162 » Tue Sep 15, 2009 2:24 am
answer is E ..

Consider A : pq>0.

If PQ >0, either P and Q should be +ve or -ve...butwe dont know about R ( it can be -ve or +ve) ... so A cant be the answer.

Consider B: Q/R < 0.

If Q/R <0, either Q or R should be -ve ... But we dont know about P ... hence B cant be the answer ..

combining both, P, Q can be +ve or -ve and R should be +ve or -ve ...

Then, we get the product as +ve and -ve.. hence E is the answer...
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E

by EMAN » Tue Sep 15, 2009 7:31 am
E is correct. Excellent work.
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