Problema Solution
Pizza Palace has 20 toppings available to make your own pizza. If you are going to choose 3, how many different types of pizza could you order?
Answer provided by our tutors
since the order of the chosen topics is not important we need to find the number of 3-combinations from 20 elements (toppings):
C(20, 3) = 20!/(3!(20-3)!)
C(20, 3) = 18*19*20/6
C(20, 3) = 1,140 different types of pizza