1. P = 0.5^3 + 0.3^3 + 0.2^3 = 0.125 + 0.027 + 0.008 = 0.16

2. 0,6*(1-0,5)*0,4=0,12;
(1-0,6)*0,5*0,4=0,08.
0,12+0,08=0,2.