Respuesta :

homeworkhelper272

Answer:

There are 220 possible ways

Step-by-step explanation:

12!/3!(12-3)!

12!/3!•9!

12•11•10•9! / 3!•9! *now you can cancel both 9!

12•11•10 / 3!

12•11•10 / 3•2•1

1320/6

220