Answer:
There will be 36,864 different varieties.
Step-by-step explanation:
As given we have following options:
Size: small, medium, or large (3)
Style: thin and crispy, hand-tossed, or pan crust (3)
Toppings: 12 choices
Lets say the order of toppings does not matter.
So, number of ways of topping = [tex]2^{12}[/tex]
Hence, total number of different pizzas will be :
[tex]3\times3\times2^{12}[/tex]
= 36864 different varieties.