GMAT Quantitative Reasoning Practice Test 6

Question : 74 of 100

Marks: +1, -0

990 people went to the GMAT exam; how many boys
didn’t pass the test?
(1) 321 girls didn’t pass the test, which is the number of boys that did.
(2) One fifth of the people that went to the GMAT exam were boys who eventually didn’t pass the test.

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.

Validate

Solution:

Statement (1) gives us information about the number of boys that passed the test but no useful information about the other part of the boys.
Statement (2) by itself gives us the answer to the question

(1/5 × 990).

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