If two events are complementary, then: MCQ with Answer and Explanation

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If two events are complementary, then:

A. P(A∩B) = P(A)P(B)

B. They are independent

C. They are mutually exclusive and exhaustive

D. P(A) = P(B)

Answer: Option C

Solution (By JKSSB Mock Tests)

Complementary events partition the sample space.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The total population of India as per Census 2011 was approximately:

A. 1.35 billion

B. 1.40 billion

C. 1.21 billion

D. 1.02 billion

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Correct Answer: Option C

Explanation:
India's population in 2011 was 1.21 billion (1210.2 million).

This question belongs to: Accountancy and Statistics Statistics

Question #2

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The Consumer Price Index for Industrial Workers (CPI-IW) is compiled by:

A. Labour Bureau, Shimla

B. Central Statistics Office

C. NSSO

D. Reserve Bank of India

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Correct Answer: Option A

Explanation:
The Labour Bureau compiles CPI-IW, a key measure of retail inflation for industrial workers.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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The harmonic mean is most appropriate for:

A. Average height

B. Average speed when distance is fixed

C. Average price

D. Average growth rate

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Correct Answer: Option B

Explanation:
HM is used for rates when the numerator is constant.

This question belongs to: Accountancy and Statistics Statistics

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