In a race where 8 cars are running, the chance that car X will win is 1/2, that Y will win is 1/4 and that Z will win is 1/3. Assuming that a dead heat is impossible, find the chance that one of them will win. Select the correct option.
A) 1/140 B) 11/12 C) 14/8 D) 13/12 E) 57/120
Required probability = P(X) + P(Y) + P(Z) (all the events are mutually exclusive).   = 1/2 + 1/4 + 1/3   = 13/12   ANSWER:13/12
<result>D</result>
In a race where 8 cars are running, the chance that car X will win is 1/2, that Y will win is 1/4 and that Z will win is 1/3. Assuming that a dead heat is impossible, find the chance that one of them will win.