JEE MATHEMATICS MCQ: PERMUTATIONS

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The number of ways are arranging 19 persons, if two particular delegates never sit together

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Correct option: D

19 !- 18 ! 2 !

Option D (19 !- 18 ! 2 !) is correct because it subtracts the number of arrangements where the two delegates are together (18! * 2!) from the total number of arrangements (19!).

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