Answer
P(at least 10000 | at least 30000) = P(at least 10000 and at least 30000) / P(at least 30000)
= 0.135 / 0.523
= 0.258
Work Step by Step
As given above
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 13 - General Rules of Probability - Chapter 13 Exercises - Page 322: 13.36b
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