Weighted Average
Average in which values contribute according to assigned weights.
x̄w = Σ(wᵢxᵢ) / Σwᵢ
Variables
- wᵢ
- weights
- xᵢ
- values
Example
Grades 80×1 and 95×2 → 90
How to use this formula
Identify the known values, keep units consistent, substitute the values into the formula, and calculate carefully. Then check whether the result is reasonable for the original problem.