HaloWarrior
New member
- Joined
- Feb 9, 2015
- Messages
- 4
Hi I have struggling to solve what I think is a counting problem. The problem is as follows " A four character code is generated by choosing each character randomly from 26 letters (a,b,c...z) and twenty digits (0,1..20). The password must contain at least one digit and no password can consist of the same character repeated four times. How many passwords are there The part in bold is what I am finding difficult to factor in my combination