9514 1404 393
Answer:
- 25 seats per row in 18 rows
- 30 seats per row in 15 rows
Explanation:
The total number of seats is 470 -20 = 450.
The number of seats in a row is found by dividing seats by rows.
In 18 rows
450 seats/(18 rows) = 25 seats/row
In 15 rows
450 seats/(15 rows) = 30 seats/row