Ms. Quarles gave the same math unit test to all her classes. She grades 25% of the tests, which is 30 papers. How many students does Ms. Quarles have in total?(1 point)
n=
Let x be the number of students in total.
So the equation would be:
0.25x = 30
Dividing each side by 0.25, we get:
x = 30 / 0.25
x = <<120=120>>120
Therefore, Ms. Quarles has 120 students in total. Answer: \boxed{120}.