Data Sufficiency (DS) | Re: Is rw = 0?

Case I- r can be any no. between -6 and 5. It can be 0 as well, so the answer to this is NOT SUFFICIENT

Case II- w can be anything but we cannot determine the value of r, which can be 0. So the ans is NOT SUFFICIENT

Combining 1&2, we still cannot determine because r can be 0 in this case as well.

So the answer is E

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