The proportion of activists in Yunnan Agricultural University in preparing for party member
10%。 During the university period, activists applied to prepare for party member, and each year, two or three students were assigned to a class, with a maximum of four or five students. In other words, within a year, a class can only absorb two or three activists to join the party. 10% probability, the number of places to join the party is quite scarce relative to the total number of college students in the class.