The hit rate is the probability, but also to find the correct answer odds. If you do not take into account a variety of factors, only to purely four options to see, the probability should be equal to 25%, but it is possible to have a certain understanding of the topic, the knowledge, you can be some kind of screening of the answer, the hit rate in the screening will increase. However, the choice of the question writer often put the test point for some kind of confusion, will affect the screening difficulty, resulting in a class of two types of errors. (One type of error: the correct answer to the wrong screening, the second type of error to the wrong answer to the wrong choice)

In order to improve the hit rate, you can use big data, statistical analysis means. All historical questions and answers to match the statistical analysis.

The analysis can be certain classification and deepening, such as the same teacher questions, tendencies and characteristics, the same period of time questions, the same type of questions. The characteristics of the correct answer. The characteristics and laws of making handsome selections. From these scientific data statistics, and then summarize the rules. Take the rules on the test. Even if there is no knowledge of the knowledge, there is a certain probability of hitting the answer. And it is given to science.

But then again, if you use this scientific attitude, the spirit of research, get the analytical model and probability summary. The time and effort spent, the input cost may be more costly than learning a course properly.