# Arrangement Probabilities

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4 different math books, 2 different Chemistry books, and 6 different physics books are arranged on a shelf. How many different arrangements are possible if:

a.)The books in each particular subject must stand together?

b.)Only the math books must stand together?

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##### Solution Summary

4 different math books, 2 different Chemistry books, and 6 different physics books are arranged on a shelf. How many different arrangements are possible if:

a.)The books in each particular subject must stand together?

b.)Only the math books must stand together?

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This is an example where the fundamental counting principle is used.

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<br>A). Since there are 4 math books, the number of arrangements is 4!=24

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<br>Since there are 2 chemistry books, the number ...

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