<PRE><B>Question 636117</B>
9 character password has four numbers (from 1 to 7) followed by two letters (from A to Z) followed by three more numbers (from 1 to 7). 
A) How many different passwords can be formed?
Ans: 7^4*26^2*7^3 = 7^7*26^2 = 556715068
---------------------------------- 
B) How many different passwords have no repeated letters or numbers?
Ans: 7*6*5*26*25*4*3*2 = 7!*26*25 = 3276000
===============
Cheers,
Stan H.
================
</PRE>