gmatbusters wrote:
Does r = 3?
(1)\(\frac{r}{3} = \frac{(27*27)}{(9*9*9)}\)
(2) \(3r = \frac{(27*27)}{(3+3)}\)
We need to answer if r = 3? in Yes or No. Either one is a definite ans.
(1) We can find the value of r.
Hence sufficient. (
On solving r = 3 so answer is "Yes" but we need not find it as a deterministic answer is there without solving as well!)
(2) We can solve for r.
Hence Sufficient! (
On solving we find that r does not equal 3 and answer is "No" , but again we need to solve to find this.)
Hence Option (D) is the choice.
Best,
Gladi
p.s - This is one example where the two statements both give a deterministic answer to the question and the answer is different for the two statements. But note, either one can be used to come up with the solution and hence D is the answer and not E. ( (1) + (2) together gives two values to r... but since (1) and (2) together are able to give answers we need not check (1) + (2) together. )
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Regards,
Gladi
“Do. Or do not. There is no try.” - Yoda (The Empire Strikes Back)