Question

How many three-letter code symbols can be formed using a set of 5 different letters if repetition is not allowed? To solve this I would only need to multiply 5x4x3 right? how would I solve it if repetition was allowed?

Answer 1

it would be 5x5x5

Answer 2

Could you please clarify? 5x5x5 would be used if repetition WAS allowed and 5x4x3 would be used if repetition is NOT allowed.... right?

Answer 3

I answered you last question.

rep. allowed: 5x5x5
rep. not allowed : 5x4x3