If P(A|B) = P(A), then events A and B are: MCQ with Answer and Explanation

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If P(A|B) = P(A), then events A and B are:

A. Exhaustive

B. Complementary

C. Mutually exclusive

D. Independent

Answer: Option D

Solution (By JKSSB Mock Tests)

Independence means P(A|B) = P(A).

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The coefficient of variation is useful for comparing:

A. Variability of datasets with different units or means

B. Medians

C. Probabilities

D. Means of two groups

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Correct Answer: Option A

Explanation:
CV = (SD/Mean)×100 provides a relative measure of dispersion.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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Which of the following is a demographic characteristic?

A. Education

B. Age

C. Occupation

D. Income

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Correct Answer: Option B

Explanation:
Age, sex, marital status are core demographic characteristics.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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If P(A) = 0.2 and P(B) = 0.3, and A, B are mutually exclusive, P(A∪B) is:

A. 0.06

B. 0.1

C. 0.5

D. 0.8

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Correct Answer: Option C

Explanation:
For mutually exclusive events, P(A∪B) = P(A) + P(B) = 0.5.

This question belongs to: Accountancy and Statistics Statistics

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