A student's marks in three subjects with weights 3, 2, 1 are 80, 90, 70 respectively. The weighted mean is: MCQ with Answer and Explanation

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A student's marks in three subjects with weights 3, 2, 1 are 80, 90, 70 respectively. The weighted mean is:

A. 82

B. 80

C. 81.67

D. 85

Answer: Option C

Solution (By JKExamLibrary)

Weighted sum = 3×80 + 2×90 + 1×70 = 490. Sum of weights = 6. Mean = 490/6 = 81.67.

This question belongs to: Accountancy and Statistics Statistics

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