# Probability-Four digit number

You are assigned a four-digit PIN by your bank. What is the probability that the four digits in your PIN will be distinct?

Please show how you achieve the answer.

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#### Solution Preview

Permutations, Probability and Combination

You are assigned a four-digit PIN by your bank. What is the probability that the four digits in your PIN will be distinct?

Answer

A four-digit number can be formed by filling each of the places with digits 0 to 9. ...

#### Solution Summary

The solution provides step by step method for the calculation of probability of four digits of a PIN being distinct. Formula for the calculation is also included.

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