The number of people seated in each section is 55.
<em><u>Explanation</u></em>
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 <u>total number of people seated in all those 5 sections</u> 
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.