Important definition: race: race course: starting point: winning point(goal): winner: dead heat race

Three athletes A, B and C participate in a race competition. The probability of winning for A and B is twice of winning for C. Then. the probability that the race is won by A or B, is

The probability of a horse A winning a race is (1)/(4) and that of a horse B winning the same race is (1)/(3) . Considering that winning is matually exclusive, find the probability that (i) Either of them win (ii) None of them win

A,B,C are three horses in a race. The probability of A to win the race is twice that of B and probability of B is twice that of C. What are the probability of A,B and C to win the race?