Elementary Statistics: Picturing the World (6th Edition)

Published by Pearson
ISBN 10: 0321911210
ISBN 13: 978-0-32191-121-6

Chapter 3 - Probability - Review Exercises - Page 183: 50

Answer

Security code = 3 letters and 1 digit, first letter cannot be A, B or C. P(unlock in first try) = 1/23 x 26 x 26 x 10 = 1/155480 = 6.43 x 10$^{-6}$ or 0.0000006

Work Step by Step

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