Traditional Culture Encyclopedia - Photography and portraiture - There are three rooms, one for deer, one for elephant and one for rabbit. There are several kinds of arranged math problems.
There are three rooms, one for deer, one for elephant and one for rabbit. There are several kinds of arranged math problems.
According to the meaning of the question, deer, elephant and rabbit are arranged in three rooms, one for each animal.
Then some situations may be as follows:
1, deer, elephant, rabbit
2. Deer, rabbits and elephants
3. Rabbits, deer and elephants
4. Rabbits, elephants and deer
5. Elephants, deer and rabbits
6. Elephants, rabbits and deer
So there are six arrangements for a * * *.
Basic counting principle and application of two commonly used extended data arrangements
1, addition principle sum classification counting method;
Each method in each class can accomplish this task independently; The specific methods in the two different methods are different from each other (that is, the classification is not heavy); Any method to accomplish this task belongs to a certain category (that is, classification does not leak).
2. Multiplication principle and step counting method:
One method of any step can't complete this task, and only by continuously completing these n steps can this task be completed; Each step is independent of each other; As long as the methods used in a step are different, the corresponding methods to complete it are also different.
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