Q14: A company has assigned a distinct 3-digit code number to each of its 330 employees. Each code number was formed from the digits 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 请问这道题如何求解阿？谢谢！ | 
(8,3)-330=6
