In a school with 5 classes, each class has 2 students less than the previous class. How many students are there in the largest class if the total number of students at school is 115?
Choose the correct choice from the following answers:
A) 25
B) 26
C) 27
D) 28
E) 29
Let x be the number of students in the largest class.   Then x + (x-2) + (x-4) + (x-6) + (x-8) = 115   5x - 20 = 115   5x = 135   x = 27   The answer is 27.
<result>C</result>
In a school with 5 classes, each class has 2 students less than the previous class. How many students are there in the largest class if the total number of students at school is 115?