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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?

Sagot :

Answer:  

Step-by-step explanation:

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