SOLUTION
North High School has 5000 students
South Highschool has
[tex]\frac{1}{10}\text{ of the students in North Highschool}[/tex]The number of students in South Highschool will be
[tex]\begin{gathered} \frac{1}{10}\times5000 \\ =500\text{ students } \end{gathered}[/tex]Hence, the answer is 500 students