A 2 a 1 d. The arithmetic mean A of any two quantities of a and b. Each being equal to the common difference.
Suppose that there is a series of n payments uniformly spaced but differing from one period to the next by a constant.
U i x i ah. Weighted Mean is an average computed by giving different weights to some of the individual values. Therefore the average score of the class in the science test was 587. If the measured distance was 16042 m calculate the correct distance between A and B.