Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 5 - Review - Test - Page 317: 10c

Answer

$P(Thin~Mints~or~Samoas®/Caramel deLites™~or~Shortbread/Trefoils)=0.53$

Work Step by Step

The events "Thin Mints", "Samoas®/Caramel deLites™" and "Shortbread/Trefoils" are mutually exclusives (disjoint events). Using the Addition Rule for Disjoint Events (page 270): $P(Thin~Mints~or~Samoas®/Caramel deLites™~or~Shortbread/Trefoils)=P(Thin~Mints)+P(Samoas®/Caramel deLites™)+P(Shortbread/Trefoils)=0.25+0.19+0.09=0.53$
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