Question

Define mean or arithmetic mean or average .

Answer 1

Arithmetic mean is the branch of mathematics dealing with the properties and manipulation of numbers.
Arithmetic mean is also called average.
Hope helped

Answer 2

$\huge \mathfrak {Hey \:There!}$

$<b >$ Arithmetic mean :- The arithmetic mean of a data set is defined to be the sum of all the observations of the data set divided by the total number of observations in the given data set.