Question

A local pizzeria offers 14 toppings for their pizzas and you can choose any 5 of them for one fixed price. How many different types of pizzas can you order with 5 toppings?

Answer 1

`C(14,5)=(14!)/(5!9!)=(10\cdot11\cdot12\cdot13\cdot14)/(2\cdot3\cdot4\cdot5)=2002`