I am pretty sure you would maybe add 1 from 2so it would be 2+1=3 so it would be 0 so i think the anwser is 0! Hope this helps but plz dont get mad at me if i get this wrong.
I think there are 12 possible outcomes in the sample space. Because if you put one crust with one topping for each crust and topping it equals up to 12.
