Statistics: Informed Decisions Using Data (4th Edition)

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

Chapter 5 - Review - Review Exercises - Page 316: 27b

Answer

The probability that the ball lands in slot 0 or slot 00 is\[\frac{1}{19}\].

Work Step by Step

The probability is calculated as \[P\left( E \right)=\frac{N\left( E \right)}{N\left( S \right)}\] The total numbers are 38, so \[P\left( E \right)=38\] There is 1 slot with number 0so\[N\left( {{E}_{1}} \right)=1\] The number of slots with number 00 is 1, so\[N\left( {{E}_{2}} \right)=1\] Substitute the values in the above formula: \[\begin{align} & P\left( E \right)=\frac{N\left( {{E}_{1}} \right)+N\left( {{E}_{2}} \right)}{N\left( S \right)} \\ & =\frac{1+1}{38} \\ & =\frac{2}{38} \\ & =\frac{1}{19} \end{align}\] Hence, the required probability 0is \[\frac{1}{19}\].
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