Problema Solution
you own 6 hats and are taking 2 on vacation. in how many ways can you choose 2 hats from 6
Answer provided by our tutors
Since the order is not important we need to find how many subsets with 2 elements are there.
This means we are dealing with 2-combinations from a set with 6 elements:
C(6, 2) = 6!/(2!(6-4)!)
C(6, 2) = 15
There are 15 ways to chose 2 hats out of 6.