- #1

Femme_physics

Gold Member

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## 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?