One weekend, there were 81 pizzas ordered for the sophomore dorm.
One weekend, there were 81 pizzas ordered for the sophomore dorm. That weekend 12
customers ordered their pizza with just pepperoni, 19 customers ordered their pizza
with just sausage, 14 ordered theirs with just onions, 17 ordered theirs with pepperoni
and sausage, 16 ordered theirs with sausage and onions, 13 ordered theirs with
pepperoni and onions, and 7 ordered theirs with all three items. How many customers
ordered their pizza with pepperoni or sausage (or both)?