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题库 / OG2017Q-DS-207
Of the 230 single-family homes built in City X last year, how many were occupied at the end of the year?
(1) Of all single-family homes in City X, 90 percent were occupied at the end of last year.(2) A total of 7,200 single-family homes in City X were occupied at the end of last year.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
题目分析：
（1） 占用单户住宅的比例没有给出，因此无法得到占用的具体数。不能解题。
（2） 同样是占用单户住宅的比例没有给出，无法得到占用的具体数值，不能解题。
因此，本题答案为（E），两个条件结合起来也不能解题，必须提供新数据。
Of the 230 single-family homes built in City X last year, how many were occupied at the end of the year?
(1) Of all single-family homes in City X, 90 percent were occupied at the end of last year.所有住宅里面有90%被占用，不知道去年建造的有多少被占用；(2) A total of 7,200 single-family homes in City X were occupied at the end of last year.一共有7200个住宅被占用，不知道去年建造的有多少被占用。
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