Respuesta :
Answer:
B. 455
Step-by-step explanation:
The order in which the toppings are chosen is not important. So we use the combinations formula to solve this question.
Combinations formula:
[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
In this question:
3 toppings from a set of 15. So
[tex]C_{15,3} = \frac{15!}{3!(15-3)!} = 455[/tex]
455 3-topping sundaes can be made.