Answer:
Assuming you are not allowed to repeat a letter within a single combination, the number of different combinations of 5 different letters is equal to n! / (n - r)! - where n is the number of letters to choose from (5), and r is the number of letters chosen.
Therefore, in this instance, the sum is equal to 5! / (5 - 5)!, which is equal to 120.
Therefore, in this instance, the sum is equal to 5! / (5 - 5)!, which is equal to 120.
