Answers
mean is 147 and sd is 31.1
P(140<z<201)= P((140-147)/31.1<z<(201-147)/31.1) = P(-0.225<z<1.736) =P(z<1.74)-(1-P(z<0.23))
from normal distribution table we get 0.9591-(1-0.5910)= 0.5501
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