Question

CODES For Exercises 8-10, use the following information. A bank gives

each new customer a 4-digit code number which allows the new
customer to create their own password. The code number is assigned
randomly from the digits 1, 3, 5, and 7, and no digit is repeated.

Answer 1

120 diff groups or 121

Answer 2

120 different groups right? that is what i am thinking please reply if correct :)