Question

My teacher wants to construct a 3-digit password from the digits 2,4,5,6, and 7. How many passwords are there if you are NOT ALLOWED to repeat numbers

Answer 1

1

Explanation:

Because there are 5 numbers, once you create a 3-digit password, there are no more passwords you can create without repeating a number.

For example,

password: 245

You can't create another password because there are only 2 other numbers you can use and your teacher wants a 3-digit password.