Ms. Smith gave the same math unit test to all her classes. She grades 25% of the tests, which is 30 tests. How many students does Ms. Smith havein total?
Ms. Smith has a total of 120 students.
To find this, we can set up a proportion:
25% of total tests = 30 tests
25% of total students = x students
(25/100) * x = 30
x = 30 * 100 / 25
x = 120
Therefore, Ms. Smith has 120 students in total.