A security code is made from 5 numbers ranging from 1-9. How many ways can the code be made without repeating any numbers? How many ways can the code be made if repeats are allowed?
So, the total number of the five-digit numbers formed is the product of 9, 10, 10, 10, and 10. Hence, there are 90000 five-digit numbers that can be formed by the digits 0-9
