A student receives ₹150 in the first week and the amount increases by ₹30 every…

MATHEMATICS · Single correct · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

A student receives ₹150 in the first week and the amount increases by ₹30 every following week. If

A_n

denotes the amount received in the

n

th week, which of the following expressions represents

A_n

? (a)

A_n = 150n + 30

(b)

A_n = 150 + n\times 30

(c)

A_n = \dfrac{n}{2}(150 + 30)

(d)

A_n = 150 + (n - 1)\times 30