Question

A password is 4 characters long and must consist of 3 letters and 1 of 10 special characters. If letters can be repeated and the special character is at the end of the password, how many possibilities are there?

Answer 1

175760 is the answer

Answer 2

1st digit = 1 of 26 letters

2nd digit = 1 of 26 letters

3rd digit = 1 of 26 letters

4th digit = 1 of 10 special characters

26 x 26 x 26 x 10 = 175,760 possibilities