A set of values has mean 20. If each value is multiplied by 2 and then 5 is added, the new mean is: MCQ with Answer and Explanation

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A set of values has mean 20. If each value is multiplied by 2 and then 5 is added, the new mean is:

A. 45

B. 25

C. 50

D. 40

Answer: Option A

Solution (By JKSSB Mock Tests)

New mean = 2 × 20 + 5 = 45.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The Net Reproduction Rate (NRR) of a population is 0.9. This indicates that:

A. Population growth is high

B. Population will eventually decline

C. Mortality is zero

D. Population is replacing itself

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Correct Answer: Option B

Explanation:
NRR < 1 means each generation is not fully replacing itself, leading to long-term decline.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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Consumer Price Index measures changes in:

A. Wholesale prices

B. Industrial production

C. Stock prices

D. Retail prices of a fixed basket of goods and services

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Correct Answer: Option D

Explanation:
CPI tracks retail prices of goods and services consumed by households.

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Question #3

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Consumer Price Index (CPI) is the preferred measure for adjusting:

A. Export duties

B. Interest rates on loans

C. Corporate tax rates

D. Social security payments and wages for inflation

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Correct Answer: Option D

Explanation:
CPI directly measures changes in the cost of living for households, making it the standard index for indexation of pensions, wages, and welfare benefits to maintain real purchasing power.

This question belongs to: Accountancy and Statistics Statistics

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