What is the principle of classified counting?

What this article shares with you is about the principle of classified counting. The editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article. Let's take a look at it with the editor.

Classified counting principle: to do one thing, there are n methods, M1 different methods in the first method, and m2 different methods in the second method. There are different methods of mn in category n, so there is a total of Numberm1roomm2+ to accomplish this. + mn different methods.

Classified counting principle: to do one thing, there are n methods, M1 different methods in the first category, and m2 different methods in the zhi. There are different methods of mn in category n, so there is a total of Numberm1roomm2+ to accomplish this. + mn different methods.

Examples are as follows:

Classified counting principle: a tour group can go from Nanjing to Shanghai by bus, by train or by air. Assuming that there are three buses a day, two trains a day and one plane a day, how many different ways are there to travel from Nanjing to Shanghai in a day? The answer is three, two, one, six.

The above is the principle of classified counting, and the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.