The total number of seats in the auditorium is 20 rows x 10 seats = 200 seats.
If only 3/4 of the seats were sold, then 3/4 x 200 seats = 150 seats were sold.
The total amount earned from the play is 150 seats x $10 per ticket = $1500.
#### 1500
The answer is: 1500
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
A play was held in an auditorium and its ticket costs $10. An auditorium has 20 rows and each row has 10 seats. If only 3/4 of the seats were sold, how much was earned from the play?

### Answer:
