Let x, y, z are three observations. The mean of these observations is

Given:

Three observations = x, y, z

Concept used:

The mean (average) of a set of observations is calculated by adding up all the observations and then dividing by the number of observations.

Calculation:

The mean (M) of these observations (x, y, z) is given by:

⇒ Mean = (x + y + z) / 3

∴ The mean of the three observations is (x + y + z) / 3.