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 120? Choose one:
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) = 120   5x -20 = 120   5x = 140   x = 28   The answer is 28.
<result>D</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 120?