WEIGHTEDAVERAGE( )
Calculates the weighted average for a set of values, given specified weights. In a weighted average, some numbers carry more importance, or weight, than others.
The values to use in the calculation. The data type must be numeric.
The weight to apply to each value.
The weighted average of a set of values.
The following example calculates the weighted average of values in the Score data field, given the weight values in the Weight data field.
For example, given the following set of scores and weights, WEIGHTEDAVERAGE( ) returns 81.75.
Score Weight (counts toward n% of grade)
50 10
75 25
80 15
90 30
95 20