A pizza place has pizzas in 3 different sizes, with 6 different flavors for the crust, and 12 different toppings. How many one-topping pizzas can be ordered?

Answer 1

Size, crust flavor, and topping are categories that do not overlap; they have no affect on each other.

When this happens, the Fundamental Counting Principle says that you can multiply the possibilities for each to get the total possible outcomes:

3 • 6 •12 = 216

216 different 1 topping pizzas are possible.