Answer:
3
Step-by-step explanation:
Step 1: Recognize you can put 1:12 into a fraction along with 36 students with 'x' as number of teachers when you have 36 students
[tex]\frac{1}{12}[/tex]
[tex]\frac{x}{36}[/tex]
Step 2: Set the 2 fraction equal to each other
[tex]\frac{1}{12} =\frac{x}{36}[/tex]
Step 3: Cross multiple and solve for 'x'
[tex]12x=36\\x=3[/tex]
Therefore there are 3 teachers present when there are 36 students in the class
