Problema Solution
One weekend, there were 99 pizzas ordered for the sophomore dorm. That weekend 16 customers ordered their pizza with just pepperoni, 18 customers ordered their pizza with just sausage, 19 ordered theirs with just onions, 12 ordered theirs with pepperoni and sausage, 13 ordered theirs with sausage and onions, 5 ordered theirs with pepperoni and onions, and 6 ordered theirs with all three items. The remaining pizzas were cheese pizzas with no toppings. How many customers ordered at most one topping on their pizza?
Answer provided by our tutors
We need to count the customers that ordered at most one topping that means: we need to count the ones that had only one topping on the pizza and the ones without topping.
One topping customer number: 16 + 18 + 19 = 53 customers ordered pizza with just one topping
No topping customer number: 99 - (16 + 18 + 19 + 12 + 13 + 5 + 6) customers ordered pizza with no topping
The sum of (One topping customer number + No topping customer number) is the number we are looking for:
99 - (16 + 18 + 19 + 12 + 13 + 5 + 6) + 16 + 18 + 19 = 99 - 36 = 63
63 customers ordered pizzas with most one topping on their pizza.