Answer
$1.4491,1.4491$
Work Step by Step
$\sigma=\sqrt{np(1-p)}$
Thus here: $\sigma_Y=\sqrt{np(1-p)}=\sqrt{10\cdot0.7\cdot0.3}=1.4491$
$\sigma_X=\sqrt{np(1-p)}=\sqrt{10\cdot0.3\cdot0.7}=1.4491$
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 14 - Binomial Distributions - Apply Your Knowledge - Page 335: 14.9c
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