Question

How many possible combinations are there if you use three characters and the characters can be letters or numbers?

Answer 1

7770 triples of distinct alphanumeric characters.

Explanation:

There are 27 alphabets A-Z in English and and 10 numeric decimal digits 0-0. When pooled together, there are 37 alphanumeric characters. So, we can make

`37C_3 = (37 X 36 X 35)/(3 X 2 X 1) = 7770` combinations of triples of distinct alphanumeric characters..