Question from the book is: A pizza parlor offers mushrooms, green peppers, onion

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Question from the book is: A pizza parlor offers mushrooms, green peppers, onions, andsausage as toppings for the plain cheese base. How many differenttypes of pizzas can be made?
My question: The solution posted was 24=16. Why would the base number be 2?? Where did the two comefrom?? Question from the book is: A pizza parlor offers mushrooms, green peppers, onions, andsausage as toppings for the plain cheese base. How many differenttypes of pizzas can be made?
My question: The solution posted was 24=16. Why would the base number be 2?? Where did the two comefrom?? A pizza parlor offers mushrooms, green peppers, onions, andsausage as toppings for the plain cheese base. How many differenttypes of pizzas can be made?
My question: The solution posted was 24=16. Why would the base number be 2?? Where did the two comefrom??

Explanation / Answer

A pizza parlor offers mushrooms, green peppers, onions, andsausage as toppings for the plain cheese base. So for each of the four toppings there exists the following 2possible cases, The pizza can be made up of the plain cheese base with thetopping offered or without the topping offered. There are 4 such toppings available. Total different types of pizzas can be made = 2 X 2 X2 X 2 = 24 = 16

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