Problema Solution
5 people want to go to a concert and there are only 3 tickets. how many groups of 3 can go
Answer provided by our tutors
We are dealing with combinations since we need to select 3 elements from a set of 5 elements:
C(5, 3) = 5!/(3!(5 - 3)!) (5! = 1*2*3*4*5, 3! = 1*2*3)
C(5 , 3) = 4*5/2
C(5, 3) = 10
There are 10 different groups of 3 that can go.