Question 164816
You can use the normal curve as an approximation to the binomial.
mean=np=58(.7)40.6
{{{std dev=sqrt(npq)}}}
{{{std dev=sqrt((58)(.7)(.3))=3.5}}}
p=.7; n=58 q=1-p=.3
a) becomes p(57.5<x<58.5) with the
correction for continuity
b) becomes p(27.5<x<30.5)  with corrections for continuity

change x's to z's, use table of standard
normal curves areas

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