solve using Probability method (math in society)

A new pizza restaurant is in town and wants to advertise the number of different types of pizza you can order. A typical order has crust (thick, thin, or regular), sauce (red or white), meat (pepperoni, Canadian bacon, sausage) and cheese (mozzarella, or mozzarella/cheddar mix).

• If you choose 1 item from each category - how many different types of pizza can they make?
• If you add none to the meat choice - how many different types of pizza can they make?
• If you can choose any amount (including none)of the different types of meat, how many choices are there for the meat category? How many different pizzas will this make?
• if you were in charge of advertising, how would you use the information you know about counting to "boost" the number of types of pizza?