How to Calculate Weighted Averages?

Normally the reference to weighted averages points to a weighted arithmetic mean. In calculating these equations, if the weights are the same, the weighted mean is the same and is called the arithmetic mean. For example, if you have two classes, one with 20 students and the other with 30 and wanted to find the weighted averages for their test grades you’d need to consider the straight average of the two–85 and weight the class means by the total number of students per class. Solving for x=(20)80 + (30) 90 as your numerator and 20+30 as your denominator and your calculated weighted average would be 86. For more information look here: