2. T here are 15 different pizza toppings that are available. A n order of pizza can be made out of 3 toppings. H ow many different kinds of pizzas can be made? What is the probability that a randomly-picked pizza has pepperoni in it?
3. S ince there are 15 toppings to choose from and we want 3 topppings in one pizza, we use the choose formula to solve this problem. SOLUTION: 15 3 C T here are 15 toppings to choose from 3 toppings are to be chosen for one pizza = 455 T herefore, 455 pizzas can be made out of 15 different toppings.
4. What is the probability that a randomly-picked pizza has pepperoni in it? SOLUTION: T otal number of pizzas that can be made Choosing pepperoni from a total of 15 toppings = 445 15 = 30.33 There is a 30.33 probability that a randomly-picked pizza has pepperoni in it. 15 3 C 15 1 C