Question 1029327
{{{P(X)=C(4,X)*(10/15)^X*(5/15)^(4-X)}}}
{{{P(3)=C(4,3)*(10/15)^3*(5/15)^(4-3)}}}
{{{P(3)=4*(1000/3375)*(5/15)}}}
{{{P(3)=20000/50625}}}
{{{P(3)=32/81}}}