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标题: [讨论]关于数据充分性问题请教： [打印本页]

作者: Sophiahan 时间: 2008-1-19 10:49
标题: [讨论]关于数据充分性问题请教：

各位大侠，小女有一个OG上数据充分性问题请教，在11th OG数学单册的149页，10题：

OF the 230 single-family homes built in CityX last year, how many were occupied at the end of the year?

(1) of all single-familiy homes in City X,90% were occupied at the end of last year

(2) A total of 7200 single-family homes in CityX were occupied at the end of last year.

答案选（E），我百思不得其解，请各位大侠赐教！先谢了！

我已经搞清楚了这题，谢谢！

[此贴子已经被作者于2008-1-19 12:24:13编辑过]

作者: wongbin 时间: 2008-1-19 13:08

[此贴子已经被作者于2008-1-19 13:11:54编辑过]

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