Question

A pizza place offers 3 different cheeses and 12 different toppings. In how many ways can a pizza be made with 1 cheese and 3 toppings

Answer 1

3 times the number of combinations of 3 from 12 (12C3)

12C3  = 12*11*10 / 3*2*1  =    220

so  number of 1 cheese + 3 toppings = 3*220  = 660