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?

Result

n =  1260

Solution:

n=9!4!⋅ 3!⋅ 2!=1260n=\dfrac{ 9! }{ 4! \cdot \ 3! \cdot \ 2! }=1260

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Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

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Math student
I presume that the solution is not correct.

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Math student
Found my mistake.

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