20 slices

How Many Pizzas For 12 People? 15 People = 6 Pizzas. How many pizzas do I need for 10 15 people? 10 people: Order four pizzas, as guests will likely eat a total of 30 slices. 15 people: Order six pizzas if each guest eats three slices for 45 total slices. 20 people: Order eight