[求助]大家谁帮我看看阿~OG一道数学题

月桂女神

弱弱弱弱弱弱弱的问~

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.

GavinDing

以下是引用月桂女神在2008-2-27 20:27:00的发言：

弱弱弱弱弱弱弱的问~

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.

去年建的230間single-family，今年有多少被使用!?

1、全部的（包括去年的）有百分之九十被使用→不清楚

2、總共有7200間（包括230間的）被使用→不清楚

1+2 還是不清楚!!!

月桂女神

以下是引用GavinDing在2008-2-27 21:23:00的发言：

去年建的230間single-family，今年有多少被使用!?

1、全部的（包括去年的）有百分之九十被使用→不清楚

2、總共有7200間（包括230間的）被使用→不清楚

1+2 還是不清楚!!!

赫赫~我明白啦~