Probability problem, the first civil service examination 139 people signed up for 9 positions. Category II 9 1 person registration 1 post. Which admission probability is high?

In terms of probability, it must be the first one with a higher probability. From a practical point of view, the probability of admission is related to the position. A good position in a good unit with a high level is much more difficult to test than a bad position in a bad unit with a low level. Because of a high-level and good position, there must be many experts among the applicants. Even though the proportion of applicants is less than that of low-level people, there are too many experts among them. Therefore, the registration rate is one of them, and it is also a very important factor in applying for positions.