# Question: assume your pin is a 2digit number in which each...

###### Question details

Assume your PIN is a 2-digit number, in which each digit is a number from 1 to 9, and numbers can be used only once. What is the probability that a thief who steals your debit card will guess your PIN on the 10th attempt after failing on the previous nine attempts? Assume the thief is reasonably intelligent and only tries a PIN number once.