Mathwords: Weighted Average

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Weighted Average

A method of computing a kind of arithmetic mean of a set of numbers in which some elements of the set carry more importance (weight) than others.

Example:

Grades are often computed using a weighted average. Suppose that homework counts 10%, quizzes 20%, and tests 70%.

If Pat has a homework grade of 92, a quiz grade of 68, and a test grade of 81, then

Pat's overall grade = (0.10)(92) + (0.20)(68) + (0.70)(81)
= 79.5

See also

Average