Question

In which of the following situations, do the lists of numbers involved form an AP? Give reasons for your answers

The fee charged from a student every month by a school for the whole session, when the monthly fee is Rs 400.

Answer 1

The fee charged from a student every month by a school for the whole session is

400, 400, 400, 400,…

Which form an AP, with common difference (d) = 400 - 400 = 0