A school board has determined that there should be 4 teachers for every 60 students. How many teachers are needed for an enrollment of 3,180 students?
A) 187 teachers
B) 223 teachers
C) 212 teachers
D) 196 teachers
E) 155 teachers

Question

Quizplus · Accepted Answer

We can set up a proportion: 
4 teachers / 60 students = x teachers / 3180 students 
We can cross-multiply and solve for x: 
4 teachers * 3180 students = 60 students * x teachers 
12720 = 60x 
x = 212 
Therefore, we need 212 teachers for an enrollment of 3,180 students. So the correct answer is C).

A School Board Has Determined That There Should Be 4