Kendra randomly picked 25 male and 25 female students from each of the 10 high schools in her town.
Since there are 25 male and 25 female students for each school, that totals to:
25 males + 25 females = 50 students per school
With 10 schools, the total number of students sampled is:
50 students/school × 10 schools = 500 students
Therefore, the total number of students included in her representative sample is 500 students.