Question

Pizzas come in 4 different sizes, each with or without a choice of 5 toppings. How many ways are there to order a pizza?

Answer 1

There are 20 ways the pizza can be ordered.

Explanation:

Choices available in Sizes = 4

Choices available is toppings = 5

Since these choices are mutually exclusive,

So, by the PERMUTATION RULE

Number of ways a pizza can be ordered is : 4 x 5 = 20

So, there are 20 ways the pizza can be ordered.