In an arithmetic progression

MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series

Problem

In an arithmetic progression, the first term is 4 and the sum of the first 12 terms is 180. What is the common difference? (a)

d = \dfrac{22}{13}

(b)

d = 2

(c)

d = \dfrac{12}{5}

(d)

d = \dfrac{11}{6}