50 people wee asked to about their preferred pizza topping s. Bellow are the the result. 35 people liked pepperoni, 25 people liked mushroom, 20 people liked pineapple. 16 people liked both pepperoni and mushroom, 7 people liked both mushroom and pineapple, 12 people liked both pepperonis and pineapple, 5 people liked all 3. How many people liked only one of the choices