GMAT Quantitative Reasoning Practice Test 6

Question : 61 of 100

Marks: +1, -0

What percent of 20 is Y?
(1) 50 percent of Y is 5.
(2) Y percent of 200 is 20.

Statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not.
Statement (2) BY ITSELF is sufficient to answer the question, but statement (1) by itself is not.
Statements (1) and (2) TAKEN TOGETHER are sufficient to answer the question, even though NEITHER statement BY ITSELF is sufficient.
Either statement BY ITSELF is sufficient to answer the question.
Statements (1) and (2) TAKEN TOGETHER are NOT sufficient to answer the question, requiring more data pertaining to the problem.

Solution:

The question, in other words, is asking what is the value of

(Y/20 × 100)

. So all we need to find out is the value of Y. Statement (1) gives us Y, it is equal to 10.
Statement (2) is also sufficient, it also tells us that Y is equal to 10.

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