Bunuel
Two hedge funds reported their performance for the last fiscal year. Hedge fund A earned 5% and hedge fund B earned 8% last year. How many more dollars did hedge fund B generate than did hedge fund A?
(1) Hedge fund B managed $2M more in assets under management than did hedge fund A.
(2) The total amount of money earned by the two hedge funds last year was $1.2M
I don't see how one could decide between C or E here. If we assume (as the solutions above do) that the "assets under management" mentioned in Statement 1 are the same "assets" on which the funds earned their 5% and 8% returns, then we have two unknowns, and each Statement gives us a distinct linear relationship between those two unknowns. So using both Statements, we can definitely solve for everything, and since neither Statement alone lets us answer the question, the answer is C.
But this question uses financial jargon you certainly don't need to know for the GMAT. I didn't know what the phrase "assets under management" even meant until I looked it up just now. And it has no agreed definition. Sometimes it means the amount invested by a fund. Sometimes it is the amount invested plus other assets, like cash on hand. And if the "assets under management" might include cash that was not invested at all, then Statement 1 does not give us a usable equation (since we have no idea how much each fund actually invested, and no idea if the 5% and 8% in the stem apply only to each fund's investments, or to their total assets), and the answer becomes E.
No actual GMAT question would be unclear about these things. If a real GMAT question wanted to you to understand that a fund earned 5% on its "assets under management", it would say so explicitly, though I can't imagine even seeing a phrase like that on the test.