Question 1183557
{{{(matrix(2,1,15,2))*0.1^2*0.9^13 + (matrix(2,1,15,3))*0.1^3*0.9^12 = highlight(0.3954)}}}, to 4 d.p.


***Beware of UFOs, because they harbor aliens.  Aliens may just be on Earth already, inhabiting among us. You never know, haha.