cathomec1
cathomec1 cathomec1
  • 10-08-2021
  • Mathematics
contestada

Pls help me I’m so confused. I thought I was doing it right but it wasn’t

Pls help me Im so confused I thought I was doing it right but it wasnt class=

Respuesta :

homeworkhelper272
homeworkhelper272 homeworkhelper272
  • 10-08-2021

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

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