I:No. 1: It ends when B throws: p = (1-1/4) *1/3 =1/4: It ends when A throws for the second time, and B only throws/kloc-0.

Two: 1: B Vote 0 times: p= 1/4.

2. The probability that b votes 1 and gets 1 every time: 3/8.

p= 1/4+3/8=5/8