| 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！ | 
