The multiplication theorem for independent events states P(A ∩ B) = P(A) × P(B). For dependent events, it becomes: MCQ with Answer and Explanation

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The multiplication theorem for independent events states P(A ∩ B) = P(A) × P(B). For dependent events, it becomes:

A. P(A) + P(B)

B. Both B and C are correct

C. P(A|B) × P(B)

D. P(B|A) × P(A)

Answer: Option B

Solution (By JKSSB Mock Tests)

For any events, P(A∩B) = P(A|B)P(B) = P(B|A)P(A); independence is the special case where P(A|B)=P(A), reducing to P(A)P(B).

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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If the Laspeyres price index is 125 and Paasche price index is 115, the Fisher index is:

A. 120.0

B. 121.0

C. 118.5

D. 119.83

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Correct Answer: Option D

Explanation:
F = √(125×115) = √14375 ≈ 119.83.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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To study the opinion of employees about a new HR policy, the HR department sends an email link to a survey. The respondents voluntarily participate. This is a:

A. Probability sample

B. Simple random sample

C. Voluntary response sample

D. Stratified sample

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Correct Answer: Option C

Explanation:
When respondents self-select, the sample is not probability-based and may be biased; this is a voluntary response sample.

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Question #3

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The method of collecting primary data where the informant is contacted through telephone is called:

A. Indirect oral investigation

B. Direct personal interview

C. Telephonic interview

D. Mailed questionnaire

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Correct Answer: Option C

Explanation:
Telephonic interview involves asking questions over the phone.

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