- #1
Femme_physics
Gold Member
- 2,550
- 1
Homework Statement
Two classes made a test.
In one class there were 30 students, and the average score was 80.
In the second class, the average score was 70.
The average of both classes was 74.
How many students were tested in the other class?
Homework Equations
The solution is 45 students
The Attempt at a Solution
Attached. I'm getting a minus, clearly I'm off :/
Can anyone clue me in?