Answer:
597 seats are filled.
Explanation:
Given the school auditorium has 22 rows with 28 seats each. At a school concert, 19 seats were empty.we have to find the number of seats which are filled.
As, there are 22 rows and each row has 28 seats

As 19 seats at the school concert are empty
∴ Total seats=Filled seats+empty seats
⇒ 616=filled seats+19
⇒ filled seats=597 seats.
Hence, no. of seats which are filled are 597 seats.