The arithmetic mean of 10, 20, 30, 40, 50 is: MCQ with Answer and Explanation

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The arithmetic mean of 10, 20, 30, 40, 50 is:

A. 30

B. 35

C. 25

D. 40

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum = 150, number = 5, mean = 150/5 = 30.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

A 'questionnaire' is said to be reliable if it:

A. Measures what it intends to measure

B. Is long and detailed

C. Yields consistent results on repeated administration

D. Has many open-ended questions

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Correct Answer: Option C

Explanation:
Reliability refers to consistency of measurement.

This question belongs to: Accountancy and Statistics Statistics

Question #2

The Wholesale Price Index (WPI) excludes:

A. Manufactured products

B. Fuel and power

C. Services

D. Primary articles

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Correct Answer: Option C

Explanation:
WPI covers only goods; it does not include services, unlike CPI.

This question belongs to: Accountancy and Statistics Statistics

Question #3

For the above frequencies, Yule's coefficient of association Q is:

A. 0.33

B. 0.714

C. 0.8

D. 0.5

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Correct Answer: Option B

Explanation:
ad = 30×40 = 1200, bc = 20×10 = 200. Q = (1200-200)/(1200+200) = 1000/1400 = 0.714.

This question belongs to: Accountancy and Statistics Statistics

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