If 3 integers are randomly selected out of 1, 2, 3, 4, 5 (no repeated numbers are allowed) to form a positive three-digit integer, then how many different integers can be formed?
If 3 integers are randomly selected out of 1, 2, 3, 4, 5 (no repeated numbers are allowed) to form a positive three-digit integer, then how many different integers can be formed?