4 numbers are in arithmetic progression. Sum of first and last number of this progression is 64. What is the average of these 4 numbers?
Show answer & explanation
Correct answer: D
Explanation
Given:
First number + Last number = 64
The numbers are in an Arithmetic Progression.
According to the formula:
Average of the Arithmetic Progression = (First number + Last number) / 2
Average = 64 / 2 = 32