Crude birth rate for a population of 200,000 with 4,000 live births in a year is: MCQ with Answer and Explanation

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Crude birth rate for a population of 200,000 with 4,000 live births in a year is:

A. 50 per 1000

B. 0.2 per 1000

C. 2 per 1000

D. 20 per 1000

Answer: Option D

Solution (By JKSSB Mock Tests)

CBR = (4000 / 200000) × 1000 = 0.02 × 1000 = 20 per 1000.

This question belongs to: Accountancy and Statistics Statistics

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Assertion (A): For independent events A and B, P(A|B) = P(A). Reason (R): Independence implies that knowledge of B does not change the probability of A.

A. A is false but R is true

B. Both A and R are true, but R is not the correct explanation of A

C. A is true but R is false

D. Both A and R are true, and R is the correct explanation of A

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Correct Answer: Option D

Explanation:
By definition, if A and B are independent, the conditional probability P(A|B) equals the unconditional probability P(A), as the occurrence of B provides no information about A.

This question belongs to: Accountancy and Statistics Statistics