The weighted harmonic mean is appropriate for averaging:
A. Prices when quantities purchased are the weights
B. Speeds when distances traveled at each speed are equal
C. Ratios where the denominators are the weights
D. Test scores with equal importance
Answer: Option C
Solution (By JKSSB Mock Tests)
Weighted harmonic mean = Σw / Σ(w/x), ideal for averaging rates or ratios (e.g., price per unit) when the weights correspond to the denominators (e.g., quantities), ensuring correct aggregation.
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