Question

Jeanine Baker makes floral arrangements. She has 13different cut flowers and plans to use 5 of them. How many different selections of the 5 flowers are​ possible?

Answer 1

5 flowers to be chosen among 13 different flowers. 
Since the order doesn't matter, it's a combination of ¹³C₅

¹³C₅ = 13!/(13-5)!(5!)

¹³C₅ = 1287 WAYS