Question

medal and fan (:
I just want to check my answer...
A pizza restaurant offers nine choices of vegetarian toppings for pizza. In how many ways can you choose four toppings? is 15,120 correct?

Answer 1

unfortunately that is incorrect

how did you get that answer?

Answer 2

i did 9! divided by 4!

Answer 3

i see, you would use the formula

n C r = (n!)/(r!*(n-r)!)

where in this case

n = 9
r = 4

Answer 4

so...

n C r = (n!)/(r!*(n-r)!)

9 C 4 = (9!)/(4!*(9-4)!)

9 C 4 = ??

Answer 5

ohhhh so its 126?

Answer 6

perfect

Answer 7

thanks you i appreciate it! (:

Answer 8

sure thign

Answer 9

thing*

Answer 10

thank* lol

Answer 11

lol its ok, we both got typos...

Answer 12

lol yeah now i dont feel as bad :P