The number of people seated in each section is 55.
Step-by-step explanation
Suppose, the number of people seated in each section is

As, the same number of people are seated in each of the 5 different sections, so the total number of people seated in all those 5 sections

Given that, there are 275 people in the movie theater. So, the equation will be....

So, the number of people seated in each section is 55.