加权平均公式
加权平均 = (数值₁ × 权重₁ + 数值₂ × 权重₂ + ... + 数值ₙ × 权重ₙ) ÷ (权重₁ + 权重₂ + ... + 权重ₙ)
Weighted Average = (Value₁ × Weight₁ + Value₂ × Weight₂ + ... + Valueₙ × Weightₙ) ÷ (Weight₁ + Weight₂ + ... + Weightₙ)
Weighted Average = (Value₁ × Weight₁ + Value₂ × Weight₂ + ... + Valueₙ × Weightₙ) ÷ (Weight₁ + Weight₂ + ... + Weightₙ)




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