There are 3 possible types of crust to choose from. Additionally, we can choose one vegetable topping out of the 5 options and one meat topping out of the 4 options. To find out the number of options, we can use the Fundamental Counting Principle.
ccccc
Number of & & Number of & & Number of
Crust & & Vegetable & & Meat
Types & & Toppings & & Toppings [0.3em]
3 & * & 5 & * & 4
Therefore, the number of possible orders of a pizza with a certain crust, one vegetable topping and one meat topping, is the product of these three values.
3 * 5 * 4 = 60
This result corresponds to answer D.
