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1. There are 70 different types of pizzas could be ordered

   A permutation is an act of arranging the objects or numbers in order.

   Combinations are the way of selecting the objects or numbers from a group of objects or collection, in such a way that the order of the objects does not matter

   Given,

   Number of options on crust=2

   Number of options on topping= 7

   Number of options on size= 5

   Therefore for each type of crust there are 7 different topping, for each toppings there are 5 different sizes

   The total number ways of ordering pizza=2×7×5=70

   Hence, there are 70 different types of pizzas could be ordered

   Learn more about Combination here

   brainly.com/question/13387529

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