Answer:
There were 120 school districts participating in the competition.
Explanation:
In order to calculate the amount of school districts that participated in the competition we need to take the total amount of students that were present and divide it by the number of students each district sent. In this case there were 3,120 students and each district sent 26 students. So we have:
number of districts = 3120/26
number of districts = 120
There were 120 school districts participating in the competition.