A password require 3 letters and 1 digit. how many possibilities?

Answer

Passwords are almost always case sensitive, for a given letter there are 26×2=52 possibilities, and for the digits we have 10 possibilities. Given the restrictions, there are three scenarios; 3 letters, 1 digit.

Explanation

ALL U NEED IS TO DOIS LETS TAKE AN EXAMPLE: Jackie1981 as a password

Step 1: 6x-10=1; step 2: 6x=11

Fuch th ckbj gcg ft tc jvuvuvu