The weighted mean is a type of average where each value is multiplied by a specific weight before summing. This accounts for how important or frequent each value is. In this case, multiplying each item by its weight, summing them, and dividing by the total weight gives a weighted average of 20.29 — reflecting the influence of each value’s weight on the overall mean.
The weighted mean of the following data is ______? Item = 18 19 20 21 22 23 24 Weights = 2 3 4 2 1 1 1
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Question context
This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the ETEA Educational Testing and Evaluation Agency preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.