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

Answer 1

Ms. Quarles has a total of 120 students in all her classes.

To find this, you can set up a proportion:

If 25% of the tests is 30 papers, then 100% of the tests is x papers.

25/100 = 30/x

Cross multiply to solve for x:

25x = 100 * 30
25x = 3000
x = 3000/25
x = 120

Therefore, Ms. Quarles has a total of 120 students.