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Subjects
Class 11MathematicsPermutations and CombinationsPermutationsMedium
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In a row of (9) people, how many arrangements are possible if two particular people always remain together?

Answer and explanation

Correct answer: (80640)

Treat the two particular people as one block, then (8!\cdot2!=80640). In exams, use the block method for together conditions.

Related tags

PermutationsTogetherBlock MethodPermutations And CombinationsMathematicsClass 11 Mcq
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