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Subjects
Class 11MathematicsPermutations and CombinationsFundamental principle of countingHard
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A shelf has (4) distinct mathematics books, (3) distinct chemistry books, and (2) distinct biology books. If books of each subject must be kept together, how many arrangements are possible?

Answer and explanation

Correct answer: (1728)

The three subject blocks can be arranged in (3!) ways and books inside blocks in (4!3!2!) ways. Use the block method for together conditions.

Related tags

Block-MethodBooksPermutationsFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq
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