JEE MATHEMATICS MCQ: PERMUTATIONS

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There are 5 different coloured balls and 5 boxes of the same colour as that of the balls. The number of ways that exactly 2 balls will go to the boxes of their own colour is

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Correct option: A

Option A (20) is correct because it is the number of ways to have exactly 2 balls in their own colored boxes, which involves derangement of the remaining 3 balls.

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