The question of probability, what is the probability of all 12 constellations for 24 people in the class? Better give a formula!

The method of randomly assigning 24 people to 12 constellations is equivalent to combining 24 people into 1 1 partition, which is C (35,24).

Assigning to 12 constellations, one for each constellation, is equivalent to assigning one to each constellation first, and then assigning the remaining 12 people at will, which is also equivalent to combining 1 1 partitions, that is, C(23,/kloc)

If each distribution method is regarded as equal probability, then the probability of 12 constellation is the ratio of the two, which is about 3.24× 10-3.