Answer
$x=841.8$
Work Step by Step
$p(z\gt z_0)=p(z\gt0)-p(0\lt z\lt z_0)=.5-p(0\lt z\lt z_0)=.1$
$p(0\lt z\lt z_0)=.4$
If $p(0\lt z\lt z_0)=.4$ then $z_0=1.28$
$z=\frac{x-\mu}{\sigma}$
$1.28=\frac{x-605}{185}$
$x=605+1.28(185)=841.8$
Statistics (12th Edition)
by McClave, James T.; Sincich, Terry T.
Published by
Pearson
ISBN 10:
0321755936
ISBN 13:
978-0-32175-593-3
Chapter 5 - Continuous Random Variables - Exercises 5.20 - 5.52 - Applying the Concepts - Basic - Page 243: 5.43e
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