A class has 100 students .Let i100, denotes the number of friends the i – th student has in the class . For each 0 j 99 , let denote the number of students having atleast j friends . Show that = , where m = 100 and n = 99.
A class has 100 students .Let i100, denotes the number of friends the i – th student has in the class . For each 0 j 99 , let denote the number of students having atleast j friends . Show that = , where m = 100 and n = 99.