Introductory Statistics 9th Edition

Published by Wiley
ISBN 10: 1-11905-571-7
ISBN 13: 978-1-11905-571-6

Chapter 4 - Section 4.5 - Union of Events and the Addition Rule - Exercises - Page 162: 4.78


P(three bedrooms) =$\frac{800}{2000}$ = 0.4 P(four bedrooms) =$\frac{600}{2000}$ = 0.3 P(three or four bedrooms) = 0.3+0.4 = 0.7 This probability is not equal to 1.0 because there are other possibilities of number of rooms other than three and four.

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