THE CORRECT ANSWER IS (E). STATEMENT (1) ALONE PROVIDES NO NUMBER...

17. The correct answer is (E). Statement (1) alone provides no number values and

therefore is obviously insufficient to answer the question. Statement (2) alone provides

the value of one number, but the value of all three numbers is needed to compute their

average. Considered together, statements (1) and (2) still allow for many possibilities.

Statement (2) tells us that one (and only one) of the three numbers equals 0. Combining

this fact with statement (1), the other two numbers might either have the same positive

value or they might be additive reciprocals. If the three numbers are 0, 2, and 2, for

example, then the average of the three numbers 5 (0 1 2 1 2) 4 3 5 4