Let x be the number of students in the SECOND most popular host country.
Let x + 8383 be the number of students in the most popular host country.
x + (x + 8383) = 50127
2x = 50127 - 8383
x = 41744/2
x = 20872
therefore, the number of students in the SECOND most popular host country is 20872 and the number of students in the most popular host country is 29255.