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

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

A. Mutually exclusive

B. Independent

C. Equally likely

D. Exhaustive

Answer: Option B

Solution (By JKSSB Mock Tests)

That is the defining condition for statistical independence.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

Fisher's ideal index is called 'ideal' primarily because it:

A. Satisfies both time reversal and factor reversal tests

B. Ignores quantity changes

C. Is the easiest to calculate

D. Uses only current period data

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Correct Answer: Option A

Explanation:
Fisher's index earns the 'ideal' label by mathematically satisfying two key consistency tests (time reversal and factor reversal), ensuring logical coherence in index number construction.

This question belongs to: Accountancy and Statistics Statistics

Question #2

Population growth rate is calculated as:

A. Both B and C are correct

B. Crude Birth Rate - Crude Death Rate

C. (Births - Deaths) / Mid-year population × 100

D. (Births + Immigration - Deaths - Emigration) / Mid-year population × 100

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Correct Answer: Option A

Explanation:
Natural growth rate = CBR - CDR (per 1,000); overall growth rate includes net migration. Both formulations are used, with B being comprehensive and C focusing on natural increase.

This question belongs to: Accountancy and Statistics Statistics

Question #3

Two dice are rolled. The probability of getting a doublet is:

A. 1/12

B. 1/3

C. 1/36

D. 1/6

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Correct Answer: Option D

Explanation:
Doublets are (1,1), (2,2), (3,3), (4,4), (5,5), (6,6). Total 6 outcomes out of 36. Prob = 6/36 = 1/6.

This question belongs to: Accountancy and Statistics Statistics

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