Arithmetic Mean

The mean is the average of the number of observations. To calculate mean we have to divide the sum of the values of the observations by the total number of observations.


The score of 8 students in science is given. Find the average score of the students.

25, 28, 23, 24, 29, 35, 42, 48



Arithmetic mean lies between the smallest and the largest observation. A range is a difference between the largest and the smallest observation.

Range = Largest Observation – Smallest Observation

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