Seven aquariums, each containing a different species of tropical fish, are to be arranged on a shelf. Because of aggressive interactions, species 1 and species 2 cannot be placed next to one another. How many arrangements are possible?

Seven aquariums, each containing a different species of tropical fish, are to be arranged on a shelf. Because of aggressive interactions, species 1 and species 2 cannot be placed next to one another. How many arrangements are possible?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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