The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 13 - General Rules of Probability - Chapter 13 Exercises - Page 321: 13.30b

Answer

P(seeing a whale or dolphin on at least 1 day) = P(seeing whale or dolphin on both days) + P(seeing a whale or dolphin on first day but not second day) + P(seeing a whale or dolphin on 2nd day but not 1st day) = (0.85 x 0.85) +[(0.85) x (1-0.85)] + [(1-0.85) x 0.85)] = 0.9775

Work Step by Step

As given above
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