Question

A password is 4 characters long, consisting of 2 letters and 2 numbers. The password must begin and end with a letter. If numbers can be repeated but letters cannot, how many possibilities are there

Answer 1

Password = 4 characters

- starts with a letter and ends with a letter

- numbers can be repeated but letters cannot

Letters:

1. 26

4. 25

Numbers:

2. 10

3. 10

You will have to multiply all the numbers you have.

Answer = (26 * 10 * 10 * 25)

Your answer would be 65,000 possibilities.