Question

Choosing a 4-letter password using only 5 letters that may each be used more than once

Answer 1

you can make the password word with the letters s,h,I,t and just put the word: this

Answer 2

Total number of available choices = 625

Step-by-step explanation:

Total number of letters available to make a password = 5

Number of letters to be used in making the password = 4

Also, it is said that the letters that may each be used more than once.

⇒ The repetition of letters in the password is allowed

So, choices available for first letter in the password = 5

Choices available for first letter in the password = 5

Choices available for first letter in the password = 5

Choices available for first letter in the password = 5

So, Total number of available choices = 5 × 5 × 5 × 5

= 625