A school auditorium has 20 chairs in the first row
MATHEMATICS · Multi-part · A Level · Mathematics · Sequences and series · Sequences and series
Problem
A school auditorium has 20 chairs in the first row. Each successive row contains 3 more chairs than the previous row. The auditorium has 25 such rows.
(i) How many chairs are there in the 25th row?
(ii) Determine the total number of chairs in all 25 rows combined.