Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 4 - Probability - 4-2 Basic Concepts of Probability - Beyond the Basics: 43

Answer

a)999:1 b)499:1 c)Wrong description.

Work Step by Step

a) We know that $odds=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes-number \ of \ good \ outcomes}$, hence $odds=\frac{999}{1000-999}=\frac{999}{1}$, hence the odds are 999:1. b)We know that $odds=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes-number \ of \ good \ outcomes}$, hence $odds=\frac{499}{500-499}=\frac{499}{1}$, hence the odds are 499:1. c) The odds against winning are 999:1, hence the odds for winning are 1:999, not 1:1000, hence the description is wrong.
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