Choosing books with no two adjacent

Topic Classification: Tags:
Topics: combinatorics, enumeration Prerequisites:
Supplies: Pedagogy:
Grade Vs Difficulty:
  EasyModerateChallengingPerplexing
1-2
3-4
5-6
7-8
9-10
11-12
13-14
Problem

There are 12 books on a shelf. In how many ways can you choose
5 of them so that no two of the chosen books are next to each other
on the shelf?

Details
Contributer: TRD
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