Answer:
C
x + y = 210
3.5x + 6y = 935
Explanation:
y = No. of students
x = No. of teachers
Total No. of people who attended the dinner = x + y = 210 ----------(eq. 1)
Amount of tickets collected from all students = 6y
Amount of tickets collected from all teachers = 3.5x
Total amount collected from students= 3.5x + 6y = 935 ------- (eq. 2)
Therefore:
x + y = 210
3.5x + 6y = 935