One weekend, there were 91 pizzas ordered for the sophomore dorm. That weekend 20 customers ordered their pizza with just pepperoni, 17 customers ordered their pizza with just sausage, 10 ordered theirs with just onions, 15 ordered theirs with pepperoni and sausage, 5 ordered theirs with sausage and onions, 12 ordered theirs with pepperoni and onions, and 4 ordered theirs with all three items. The remaining pizzas were cheese pizzas with no toppings. How many customers ordered at most two toppings on their pizza?
A) 87
B) 32
C) 79
D) 26

Question

Quizplus · Accepted Answer

There were 20 customers who ordered pepperoni, 17 who ordered sausage, and 10 who ordered onions. There were 15 who ordered pepperoni and sausage, 5 who ordered sausage and onions, 12 who ordered pepperoni and onions, and 4 who ordered all three. So, there were a total of 20 + 17 + 10 + 15 + 5 + 12 + 4 = 83 customers who ordered at most two toppings on their pizza. Add to that the 8 customers who ordered cheese pizzas with no toppings, and you get a total of 83 + 8 = 91 customers who ordered at most two toppings on their pizza.

One Weekend, There Were 91 Pizzas Ordered for the Sophomore