📐 Mathematics · Sequences and Series · JEE

The arithmetic mean of 8 and 20 is:

Answer: 14.

Correct answer: C. 14

Explanation: AM = (8+20)/2 = 28/2 = 14.

Bar heights for AP 2, 5, 8, 11 with the common difference d=3 marked between consecutive terms.

Concept context

Arithmetic progressions, geometric progressions, and sums