Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 4 - Probability - 4-6 Counting - Basic Skills and Concepts: 6

Answer

$\frac{1}{1,000,000,000}$.

Work Step by Step

There are 10 digits, so by using the fundamental counting rule we can get the number of possibilities: $10\times10\times10\times10\times10\times10\times10\times10\times10=1000000000$. We also know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$, therefore $P=\frac{1}{1,000,000,000}$.
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