Question 1206638


{{{P(X=x)=C(n,x)*p^x*(1-p)^(n-x)}}}

{{{n=7}}}
{{{p=0.2}}}
{{{x>1}}}


{{{P(X>1)=P(X=2)+P(X=3)+P(X=4)+P(X=5)+P(X=6)+P(X=7)}}}

{{{P(X>1)=C(7,2)*0.2^2*(1-0.2)^(7-2)+C(7,3)*0.2^3*(1-0.2)^(7-3)+C(7,4)*0.2^4*(1-0.2)^(7-4)+C(7,5)*0.2^5*(1-0.2)^(7-5)+C(7,6)*0.2^6*(1-0.2)^(7-6)+C(7,7)*0.2^7*(1-0.2)^(7-7)}}}
{{{P(X>1)=0.2752512+0.114688+0.028672+0.0043008+0.0003584+0.0000128}}}

{{{P(X>1)=0.423}}}