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标题: GWD数学疑难问题！ [打印本页]

作者: chengcheng7 时间: 2008-9-23 07:25 标题: GWD数学疑难问题！

Q14:

A company has assigned a distinct 3-digit code number to each of its 330 employees. Each code number was formed from the digit 2, 3, 4, 5, 6, 7, 8, 9，and no digit appears more than once in any one code number. How many unassigned code numbers are there?

A. 6 B. 58 C. 174 D. 182 E. 399

Answer: A

网上没搜到这道题，请牛牛帮助解答，谢谢！

作者: veroniquelins 时间: 2008-9-23 20:15

P38-330 =6

简单的可怕。。。

作者: chengcheng7 时间: 2008-9-24 06:38

谢谢！惭愧！~

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