Letter and Digit A new computer owner creates a password consisting of two characters. She randomly selects a letter of the alphabet for the first character and a digit (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) for the second character. What is the probability that her password is “K9”? Would this password be effective as a deterrent against someone trying to gain access to her computer?