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In how many ways can 4 balls be placed in 4 boxes if 3 balls are indistinguishably white, 1 ball is black, and the boxes are indistinguishable?

 Jun 23, 2023
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There are 4 ways to choose the box for the black ball.

After we have placed the black ball, there are 3! ways to arrange the white balls in the remaining 3 boxes.

So the total number of ways to place the balls is 4 * 3! = 24.

 Aug 20, 2023

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