Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 4 - Probability - 4-5 Multiplication Rule: Complements and Conditional Probability - Page 172: 12

Answer

$0.2$

Work Step by Step

The probability of getting at least one answer correct is equal to the probability of getting the last answer correct because the first nine answers are incorrect. There are five choices, therefore the probability of choosing the correct one is $\frac{1}{5}=0.2$.
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