The AVERAGE.WEIGHTED function in Google Sheets is designed to find the weighted average of a set of values. It requires both the values and their corresponding weights to calculate the result. This function simplifies the process of calculating weighted averages by eliminating the need for multiple formulas, such as SUMPRODUCT()/SUM() which is used in Excel.

To use the AVERAGE.WEIGHTED function in Google Sheets, you need to input the values and their corresponding weights into the function's syntax as follows:

AVERAGE.WEIGHTED(values, weights, [additional values], [additional weights])

• values: The set of numbers you want to average.
• weights: The corresponding weights for each value.

You can also include optional additional values and weights if needed. The function will then return the weighted average of the input data.

Here are some examples of calculating weighted averages using the AVERAGE.WEIGHTED function in Google Sheets:

• A simple weighted average of two numbers: AVERAGE.WEIGHTED(10, 1, 20, 3) which calculates to 3.5.
• Using cell ranges for values and weights: AVERAGE.WEIGHTED(A1:A2, B1:B2) where A1:A2 contains the values and B1:B2 contains the corresponding weights.
• Including additional values and weights: AVERAGE.WEIGHTED(A1:A2, B1:B2, C1, C2).

These examples demonstrate how to apply the function to different scenarios, from simple calculations to more complex ones involving cell ranges and additional parameters.

To calculate a student's final grade using weighted averages in Google Sheets, you can use the AVERAGE.WEIGHTED function with the grades as the values and the percentage of the final grade as the weights. For example:

=AVERAGE.WEIGHTED(B2:B6, C2:C6)

In this formula, B2:B6 contains the student's grades for different items (Homework, Participation, Midterm exam, Projects, Final exam), and C2:C6 contains the corresponding percentages of the final grade. The function will return the weighted average of the grades, which represents the student's final grade.