Answer:
The odds in favor of an event are defined as the ratio of the probability that the event will happen to the probability that it will not happen. In this case, the odds in favor of Chris winning the election are given as 7:6. This means that for every 7 times Chris wins, he does not win 6 times.
To find the probability that Chris wins (a), we can use this information to set up a proportion: `7/(7+6) = 7/13`. So, the probability that Chris wins is **7/13**.
To find the probability that Chris does not win (b), we can subtract the probability that he wins from 1: `1 - (7/13) = 6/13`. So, the probability that Chris does not win is **6/13**.