Question

How many different 5-digit PIN codes are there that only include the digits 6, 2, 5, 4, 8 and 7?

Answer 1

First, there are NO 5-digit pin codes that include the digits 7, 2, 4, 6, 9, and 3. But, there are 720 pin codes that include 5 out of the 6 digits.

Explanation: