Joke Collection Website - Joke collection - There are three people performing sketches, and there are three roles in * * *. What are the possibilities of their role arrangement?
There are three people performing sketches, and there are three roles in * * *. What are the possibilities of their role arrangement?
Permutation and combination problem:
Suppose three people are ABC and three roles are 123. There are six possibilities:
A 1？ B2？ C3； A2？ B3？ c 1； A3？ B 1？ C2； A 1？ B3？ C2； A2？ B 1？ C3； A3？ B2？ C 1
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