College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 9, Counting and Probability - Chapter 9 Review - Exercises - Page 683: 15

Answer

14

Work Step by Step

If 1 symbol is used, there are 2 ways to create a sequence. If 2 symbols are used, there are $2 \times 2 = 4$ ways. If 3 symbols are used, there are $2\times2\times2 = 8$ ways. In total, there are $2 + 4 + 8 = 14$ ways.
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