How the collison probability for A and B for the first round is 1??
A and B can take values between (0,1) .. this gives 4 combinations (0,0),(0,1),(1,0) and (1,1) ?
Prob(collison)= 2/4 =0.5 . . Isn't it??? plz check this https://gateoverflow.in/66836/madeeasy-2017