Question 1078147
{{{P(X)=C(12,X)*(0.36)^X*(1-0.36)^(12-X)}}}
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*[illustration PS9.JPG].
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a) {{{P(3)=0.185}}}
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b) {{{P=sum(P(X),X=4,12)=0.680}}}
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c) {{{P=sum(P(X),X=1,7)=0.970}}}