Average is the value that is used to represent the set of values of data as is the average calculated from whole data and this formula is calculated by adding all the values of the set given denoted by summation of X and dividing it by the number of values given in set denoted by N. W a n d x w. Total age of 20 students 131 20 262 years Average age of 30 students 129 years.
Multiply each weight w with its corresponding value x.
Using the formula for calculating average. If you have a set of numbers the average is found by adding all numbers in the set and dividing their sum by the total number of numbers added in the set. Terms Average Symbol. The following is the formal mathematical formula for the arithmetic mean a fancy name for the average.