One weekend, there were 88 pizzas ordered for the sophomore dorm. That weekend 15 customers ordered their pizza with just pepperoni, 20 customers ordered their pizza with just sausage, 18 ordered theirs with just onions, 12 ordered theirs with pepperoni and sausage, 11 ordered theirs with sausage and onions, 6 ordered theirs with pepperoni and onions, and 2 ordered theirs with all three items. How many customers ordered their pizza with pepperoni or sausage (or both)?
A) 35
B) 60
C) 47
D) 10

Question

Quizplus · Accepted Answer

To find the number of customers who ordered pizza with pepperoni or sausage (or both), we use the principle of inclusion-exclusion: 15 (pepperoni) + 20 (sausage) - 12 (pepperoni and sausage) + 12 (pepperoni and sausage) + 2 (all three) = 60.

One Weekend, There Were 88 Pizzas Ordered for the Sophomore