【GMAT考满分数据洞察DS题库】A country's population increased _真题_答案

题目内容

A country's population increased $x\%$ in 2011 and then by $y\%$ in 2012. By what percent did the population increase over those two years?

(1) $xy=50$

(2) $100x+100y+xy=2150$

AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
BStatement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
CBOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
DEACH statement ALONE is sufficient.
EStatements (1) and (2) TOGETHER are not sufficient.

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正确答案: B

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