A car travels 60 km/h for the first half of a distance and 40 km/h for the second half. The average speed (km/h) is: MCQ with Answer and Explanation

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A car travels 60 km/h for the first half of a distance and 40 km/h for the second half. The average speed (km/h) is:

A. 50

B. 48

C. 45

D. 52

Answer: Option B

Solution (By JKSSB Mock Tests)

Harmonic mean of speeds: 2 / (1/60 + 1/40) = 2 / (5/120) = 240/5 = 48 km/h.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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If in a moderately skewed distribution mean = 30 and median = 28, the empirical mode is approximately:

A. 22

B. 24

C. 32

D. 26

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Correct Answer: Option B

Explanation:
Using the empirical relation: Mode ≈ 3Median - 2Mean = 3×28 - 2×30 = 84 - 60 = 24.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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The primary measure of inflation used by RBI for monetary policy is:

A. GDP deflator

B. CPI (Combined)

C. Consumer food price index

D. Wholesale Price Index

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Correct Answer: Option B

Explanation:
RBI adopted the CPI (Combined) as the key measure of inflation for policy targets.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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The Sample Registration System (SRS) provides data on:

A. Births and deaths by age, sex, and residence

B. Agricultural output

C. Industrial production

D. Maternal mortality only

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Correct Answer: Option A

Explanation:
SRS generates annual estimates of fertility and mortality indicators.

This question belongs to: Accountancy and Statistics Statistics

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