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Weighted means and data
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Learn it In a weighted mean, each value counts according to its weight: multiply each value by its weight, add, and divide by the total weight.
Example: Tests count 40% and the exam 60%. Tests 80%, exam 70%. Final mark?
- $80 \times 0.4 = 32$.
- $70 \times 0.6 = 42$.
- Final: $32 + 42 = 74\%$.
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