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# 9 balls are to be placed in 9 boxes; and 5 of the balls cannot fill into 3 small boxes. The number of ways of arranging one ball in each of the boxes is

$\begin {array} {1 1} (1)\;18720 & \quad (2)\;18270 \\ (3)\;17280 & \quad (4)\;12780 \end {array}$
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