Question

Customer account "numbers" for a certain company consist of 2 letters followed by 3 numbers. Step 2 of 2 : How many different account numbers are possible if repetitions of letters and digits are not allowed?

Answer 1

Explanation:

letters can be chosen in 26×25=650 ways

digits can be chosen in 10×9×8=720 ways

total number of ways=650×720=468000 ways.