Rotor: Choosing & Positioning There are 2 things: 1. Choosing the rotors: Say choosing 3 from 5 rotors. That will be 5*4*3 or 5C3. 2. Positioning the rotors: Once we have chosen the rotors, they can be permuted. 3 rotors would be 3! i.e. 6 different ways. Reply
There are 2 things:
1. Choosing the rotors: Say choosing 3 from 5 rotors. That will be 5*4*3 or 5C3.
2. Positioning the rotors: Once we have chosen the rotors, they can be permuted. 3 rotors would be 3! i.e. 6 different ways.