Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 10 Counting Methods and Probability - 10.1 Apply the counting Principles and Permutations - 10.1 Exercises - Problem Solving - Page 689: 71a



Work Step by Step

We have $5!$ arrangements, but each of them is counted $5$ times. This is because we can "rotate" each arrangement by $1$ clockwise and we get the same arrangement but after $5$ rotations we get back to the original arrangement. Hence the answer is: $5!/5=4!=24$
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