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. 80

B. 81.67

C. 82

D. 85

Answer: Option B

Solution (By JKSSB Mock Tests)

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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Question #1

In tabulation, 'box-head' refers to:

A. The left part with row headings

B. The title of the table

C. The part of the table containing column headings

D. The footnotes

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Correct Answer: Option C

Explanation:
Box-head is the portion above the stub containing the column captions.

This question belongs to: Accountancy and Statistics Statistics

Question #2

Which of the following statements about Laspeyres and Paasche indices is correct?

A. Laspeyres uses current period quantities, Paasche uses base period quantities.

B. Fisher's index is the geometric mean of Laspeyres and Paasche.

C. Laspeyres index tends to understate price increase, Paasche overstates.

D. Paasche index satisfies the time reversal test.

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Correct Answer: Option B

Explanation:
Fisher = √(L×P). L uses base quantities, P uses current quantities. L overstates, P understates. Neither L nor P satisfies time reversal.

This question belongs to: Accountancy and Statistics Statistics

Question #3

For attributes, the class frequency (α) denotes:

A. Total frequency

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C. Number not possessing A

D. Number possessing A

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Correct Answer: Option C

Explanation:
(α) is the number of items that lack attribute A.

This question belongs to: Accountancy and Statistics Statistics

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