The ratio of students to teachers, is B, 8/1.
This is because if there are 24 students and 3 teachers, and you need to know the amount of students there would be per teacher, you divide both given numbers by 3.
24 divided by 3 is 8 (representing students)
and 3 divided by 3 is 1 (representing teachers)
Thus, the answer is 8/1