Respuesta :
actually the answer is 16! - 10!, or 5,765,760
you have 16 choices for topping 1, then assuming you don't choose the same topping more than once you 15 for the second, etc
16*15*14*13*12*11
you have 16 choices for topping 1, then assuming you don't choose the same topping more than once you 15 for the second, etc
16*15*14*13*12*11