Question 1085435
{{{P(X)=C(12,X)(0.42)^X(1-0.42)^(12-X)}}}
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*[illustration 338.JPG].
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a) {{{P(X=3)=0.121}}}
b) {{{P(X>=4)=P(4)+P(5)+P(6)+P(7)+P(8)+P(9)+P(10)+P(11)+P(12)=0.815}}}
c) {{{P(X<8)=P(0)+P(1)+P(2)+P(3)+P(4)+P(5)+P(6)+P(7)=0.924}}}