Essentials of Statistics (5th Edition)

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

Chapter 4 - Probability - 4-3 Addition Rule - Page 154: 17

Answer

$1$

Work Step by Step

A subject always has a positive or negative result for sure, therefore the probability of this event is 1.
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