Which of the following about Census 2011 is incorrect? MCQ with Answer and Explanation

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Which of the following about Census 2011 is incorrect?

A. The sex ratio was 940 females per 1000 males.

B. The literacy rate was 74.04%.

C. It was the 15th Census of India.

D. The population was 1.21 billion.

Answer: Option A

Solution (By JKSSB Mock Tests)

Sex ratio was 943, not 940.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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A committee of 4 is to be selected from 5 men and 4 women. The probability that the committee has exactly 2 women is:

A. 20/63

B. 1/2

C. 10/21

D. 5/9

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Correct Answer: Option C

Explanation:
Total ways C(9,4)=126. Favorable: C(4,2)×C(5,2)=6×10=60. Probability = 60/126 = 10/21.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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Two independent events A and B have probabilities 0.4 and 0.5. The probability that exactly one of them occurs is:

A. 0.5

B. 0.2

C. 0.9

D. 0.7

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Correct Answer: Option A

Explanation:
P(Exactly one) = P(A) + P(B) - 2*P(A ∩ B) = 0.4 + 0.5 - 2*(0.4*0.5) = 0.9 - 0.4 = 0.5.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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Consider attributes: Vaccination (A) and Immunity (B). If (AB) = 150, (A) = 200, (B) = 300, N = 500, what type of association exists?

A. Independent

B. Positive Association

C. Inconsistent Data

D. Negative Association

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Correct Answer: Option B

Explanation:
Expected (AB) if independent = (200*300)/500 = 120. Actual (AB) = 150. Since Actual > Expected, the association is positive.

This question belongs to: Accountancy and Statistics Statistics

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