1st row = 10 seats
2nd row = 10 + 1 = 11 seats
3rd row = 10 + 2 = 12 seats
nth row = 10 + (n-1) seats
Find the number of seats in the 24th row:
24th row = 10 + (24 - 1) = 33 seats
Find total number of seats:
Total number of seats = [tex] \dfrac{n}{2} (a_1+a_{24}) = \dfrac{24}{2} (10+33)= 516[/tex]
Answer: 516 seats
