问题描述：
一道GMAT OG上的数学题
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 7200 single-family homes in City X were occupied at the end of last year.
为什么答案给的是说着两个条件知道了哪一个都没有办法得出结果阿~
句首的of怎么翻译阿?
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 7200 single-family homes in City X were occupied at the end of last year.
为什么答案给的是说着两个条件知道了哪一个都没有办法得出结果阿~
句首的of怎么翻译阿?
问题解答：
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