Answer
See below.
Work Step by Step
If a success and a failure is added in each sample, then the number of successes will increase by $1$ and the sample size will increase by $2$.
Hence here: $n_1=53+2=55,x_1=6+1=7$
$n_2=108+2=110,x_1=45+1=46$
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 23 - Comparing Two Proportions - Apply Your Knowledge - Page 550: 23.7b
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