The average of a series of five numbers, in which each term is greater than its previous term by 3, is 12. What is the value of the greatest term?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 18.
Let the five numbers be (x - 6), (x - 3), x, (x + 3), (x + 6).
Given, (x - 6) + (x - 3) + x + (x + 3) + (x + 6) = 12 × 5
⇒ 5x = 60
⇒ x = 12
Required answer = 12 + 6 = 18