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OpenStudy (anonymous):

Probability: A town is having water rationing. 12 houses assigned to 7 days. What is the Probability that there are 3 days on which 3 houses may water, 1 day on which 2 houses may water, and 1 day on which 1 house may water?

OpenStudy (anonymous):

I don't know how to start setting this up. Multinomial for total possible outcomes? \[\left(\begin{matrix}18 \\ 7\end{matrix}\right)\]? Anyone?

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