For two attributes A and B, if (A)=80, (B)=70, N=100, and they are independent, then (AB) should be: MCQ with Answer and Explanation

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For two attributes A and B, if (A)=80, (B)=70, N=100, and they are independent, then (AB) should be:

A. 50

B. 70

C. 80

D. 56

Answer: Option D

Solution (By JKSSB Mock Tests)

Expected (AB) = (80×70)/100 = 56.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The crude birth rate and crude death rate of a country are 18 and 6 per 1000. The rate of natural increase is:

A. 3%

B. 0.6%

C. 1.2%

D. 12 per 1000

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Correct Answer: Option D

Explanation:
RNI = 18-6 = 12 per 1000.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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A questionnaire should generally begin with:

A. Ambiguous questions

B. Simple and general questions

C. Sensitive and personal questions

D. Leading questions

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Correct Answer: Option B

Explanation:
Starting with simple, non‑threatening questions builds rapport and encourages the respondent to continue.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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The General Fertility Rate is affected by:

A. Marital status distribution

B. Both A and B

C. Total population size

D. Age structure of women of reproductive age

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Correct Answer: Option B

Explanation:
GFR does not account for age-marital composition; thus it is influenced by the proportion of married women and age distribution within 15-49.

This question belongs to: Accountancy and Statistics Statistics

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