
Home > A2C > Chapter 10 > Lesson 10.2.6 > Problem 10-154
10-154.
Find how many types of pizzas with three toppings can be made.
8C3
Find how many pizzas with four toppings can be made.
8C4
8C3 + 8C4 = 56 + 70 = 126
If mushrooms are a known topping, then you choose one fewer topping from only 7 remaining toppings.