What is it used for: It calculates the average of a set of values, but with different weights for each value.

How it works: Each value is multiplied by a specific weight, and then the sum of the products is divided by the sum of the weights.

Calculation: Multiply each value by its weight and then divide the sum of these products by the sum of the weights.

Usage: Useful for calculating weighted averages in situations such as school grades, financial analysis, and portfolios.

Formula: Weighted Average = (Sum of Values * Weights) / Sum of Weights