Posted by Anonymous on .
Suppose that pizzas can be ordered in four sizes (small, medium, large, and Illinisize), with three crust choices (thin, thick, and Chicago style), four choices of meat (sausage, pepperoni, hamburger, and none) and two types of cheese (regular or double). How many different styles of pizza can be ordered?

math 
MathMate,
How many sizes? 4. So 4 sizes.
How may crust choices? 4. So a total of 4*4=16 styles.
How many choices of meat? 4. So a total of 4*16=64 styles.
How many ...
Get the idea?