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Ten different books are to be tied into two bundles of 5 books each. In how many ways can this be done?

Competition practicePermutations & Combinations
  • A126
  • B252
  • C63
  • D120

Step-by-Step Solution

Choosing 5 for one bundle gives , but the bundles are not labelled, so each split is counted twice: .
Answer: A) 126

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