201k views
0 votes
Pls help me I’m so confused. I thought I was doing it right but it wasn’t

Pls help me I’m so confused. I thought I was doing it right but it wasn’t-example-1

1 Answer

4 votes

Answer:

There are 220 possible ways

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

User Dagrada
by
6.6k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.