Help TT 10-14

------------------------------------------------------------------------------------------------------------

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

＝ P（8，3）－330

＝8×7×6－330

＝6