Answer:
Explanation:
you have a total of 3*3 = 9 choices for these 2 parts of the pizza. The number of ways to choose 3 toppings from 7 options is given by 7C3, which is read "7 choose 3". If you don't know what this symbol means, or why it's the appropriate formula for this kind of problem, you should talk to your teacher or one of your classmates or meet with a tutor in person. The explanation is not particularly complicated but it is somewhat lengthy to type out. Once you have calculated 7C3 you can simply multiply that number by the 3 crust choices and the 3 cheese choices to determine the total number of options.