Task: Question Answering
Input (English): Question: In a race where 10 cars are running, the chance that car X will win is 1/7, that Y will win is 1/3 and that Z will win is 1/5. Assuming that a dead heat is impossible, find the chance that one of them will win.

 Option A: 1/140

 Option B: 1/180

 Option C: 71/105

 Option D: 21/113

 Option E: 57/120
Output (English): Option C