If r/s = 2/5 , what is the value of rs ?
(1) If 2s/5 is multiplied by 12, the result is 25.
(2) If 5r/2 is multiplied by 4, the result is 250.
Though it looks like standard D (two unknowns, two equations : one equation in question stem and one equation from each answer choices) I'm getting two different values of r and 2 from two statements.
So in such cases, the answer should be E. What do you guys think?
Or am I making another silly calculation mistake?
Source : Jeff Sachmann DS challenge