Because AB is independent of each other, the probabilities of AB and AB do not affect each other.

( 1)0. 1*0. 1=0.0 1

(2)0. 1*0.3=0.03

(3)0. 1*0.3+0.4*0.6+0.5*0. 1=0.03+0.24+0.05=0.32

(4)0.5*0.3 (A cloth and B stone) +0. 1.6 (A stone and B scissors) +0.4*0. 1 (A scissors and B cloth) = 0. 15+0.06+0.04.

(5) The winning probability of B = 1-0.32-0.25=0.43, or 0.3 * 0.4+0.6 * 0.5+0.1* 0./= 0.43.

So b has a good chance of winning.