Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 12 Sequences and Series - Cumulative Review - Page 849: 49

Answer

$\approx0.727$

Work Step by Step

The number of all possible selections is: $20\cdot20\cdot20\cdot20=160000$. The number of all possible selections where we select different items is: $20\cdot19\cdot18\cdot17=116280$. Hence the probability: $\frac{116280}{160000} \approx0.727$
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