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MATH / Suppose that I have an unlimited supply of identical math books, history books,…

Problem

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problem

Suppose that I have an unlimited supply of identical math books, history books, and physics books.  All are the same size, and I have room on a shelf for 8 books.  In how many ways can I arrange eight books on the shelf if no two books of the same type can be adjacent?

level

Level 3

type

Counting & Probability

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