Заболеют 0,1,2,3,4,5 человек:
p=0,3; q=1-0,3=0,7;
Cₐⁿ=a!/(n!(a-n)!)
С₅₀⁰q⁵⁰+С₅₀¹q⁴⁹p+С₅₀²q⁴⁸p²+С₅₀³q⁴⁷p³+С₅₀⁴q⁴⁶p⁴+С₅₀⁵q⁴⁵p⁵=
q⁴⁵(С₅₀⁰q⁵+С₅₀¹q⁴p+С₅₀²q³p²+С₅₀³q²p³+С₅₀⁴qp⁴+С₅₀⁵p⁵)=
0,7⁴⁵(0,16807+3,6015+37,81575+259,308+1305,801+5148,5868)=
0,0007223
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Заболеют 0,1,2,3,4,5 человек:
p=0,3; q=1-0,3=0,7;
Cₐⁿ=a!/(n!(a-n)!)
С₅₀⁰q⁵⁰+С₅₀¹q⁴⁹p+С₅₀²q⁴⁸p²+С₅₀³q⁴⁷p³+С₅₀⁴q⁴⁶p⁴+С₅₀⁵q⁴⁵p⁵=
q⁴⁵(С₅₀⁰q⁵+С₅₀¹q⁴p+С₅₀²q³p²+С₅₀³q²p³+С₅₀⁴qp⁴+С₅₀⁵p⁵)=
0,7⁴⁵(0,16807+3,6015+37,81575+259,308+1305,801+5148,5868)=
0,0007223