If you have 5 different color shirts how many combos of three can you make

Question

Ronaldo has the jerseys of five soccer teams Ajax BOKA Chicago Dallas and Atherton he wants to send three jerseys to his niece . How many combinations of three different jerseys can Rinaldo sent to his niece?

Answer 1

Combinations (where order does not matter = n!/[(n-r))r!] = 5!/[(2!)(3!)] = 10