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(8) distinct books are to be arranged in a row. Two particular books must be together, and a third particular book must be at one end of the row. How many arrangements are possible?

Answer and explanation

Correct answer: (1440)

The third book has (2) end choices, and the two adjacent books are treated as a block with the remaining objects. Count the (2!) internal orders of the block too.

Related tags

BooksBlock-MethodEnd-PositionFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq

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