The weighted arithmetic mean is calculated as: MCQ with Answer and Explanation

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The weighted arithmetic mean is calculated as:

A. √(Πx)

B. Σ(wx) / Σw

C. Σx / n

D. n / Σ(1/x)

Answer: Option B

Solution (By JKExamLibrary)

Weighted mean = sum of (value × weight) divided by sum of weights, allowing differential importance of observations, e.g., in index numbers or survey sampling.

This question belongs to: Accountancy and Statistics Statistics

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Two events are mutually exclusive if they:

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B. Have equal probabilities

C. Always occur together

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Correct Answer: Option A

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