The weighted mean of 4, 6, 8 with weights 1, 2, 3 respectively is: MCQ with Answer and Explanation

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The weighted mean of 4, 6, 8 with weights 1, 2, 3 respectively is:

A. 6.67

B. 8

C. 7

D. 6

Answer: Option A

Solution (By JKSSB Mock Tests)

Weighted sum = 4×1+6×2+8×3 = 4+12+24=40. Sum of weights=6. Mean=40/6≈6.67.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

If (A)=60, (B)=50, N=100, the maximum possible value of (AB) is:

A. 60

B. 10

C. 100

D. 50

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Correct Answer: Option D

Explanation:
(AB) cannot exceed the smaller of (A) and (B), hence 50.

This question belongs to: Accountancy and Statistics Statistics

Question #2

If the current WPI is 140 and base year WPI is 100, the inflation rate is:

A. 28.6%

B. 40%

C. 140%

D. 100%

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Correct Answer: Option B

Explanation:
Inflation rate = (140 - 100)/100 × 100% = 40%.

This question belongs to: Accountancy and Statistics Statistics

Question #3

Which reproduction rate indicates the exact potential of a population to replace itself?

A. General Fertility Rate

B. Gross Reproduction Rate

C. Total Fertility Rate

D. Net Reproduction Rate

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Correct Answer: Option D

Explanation:
Net Reproduction Rate (NRR) accounts for female mortality before reaching the end of the reproductive period.

This question belongs to: Accountancy and Statistics Statistics

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