Three workplaces

How many ways can we divide nine workers into three workplaces if they need four workers in the first workplace, 3 in the second workplace and 2 in the third?

Correct result:

n =  1260

Solution:

$n={\displaystyle \frac{9!}{4!\cdot 3!\cdot 2!}}=1260$

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Showing 2 comments:

Math student

I presume that the solution is not correct.

1 year ago  Like

Math student

Found my mistake.

1 year ago  Like

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