## anonymous one year ago A local pizzeria offers 11 toppings for their pizzas and you can choose ant 5 five of them for one fixed prize. How many different types of pizzas can you order with 5 toppings? A. 462 B. 120 C. 55,440 D. 332,640

1. DanJS

Combination - 11 choose 5

2. DanJS

$\frac{ 11! }{ 5!*(11-5)! }$

3. DanJS
4. anonymous

So it would 11/30, i don't understand what the exclamation marks, explain.

5. anonymous

I got the formula: 1089.....(7)/5!

6. DanJS

factorial for example, 5! = 5 * 4 * 3 * 2 * 1 multiplication of all the numbers down to 1

7. DanJS

|dw:1438104503373:dw|

8. anonymous

I got 115.5

9. anonymous

I multiplied wrong its actually 462

10. anonymous

Thanks DanJS

11. DanJS

welcome