In a binomial distribution with n=5 and p=0.4, the probability of exactly 2 successes is: MCQ with Answer and Explanation

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In a binomial distribution with n=5 and p=0.4, the probability of exactly 2 successes is:

A. 0.4

B. 0.2304

C. 0.3456

D. 0.5

Answer: Option C

Solution (By JKSSB Mock Tests)

C(5,2)(0.4)^2(0.6)^3 = 10 × 0.16 × 0.216 = 0.3456.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

For mutually exclusive events A and B with P(A)=0.4, P(B)=0.3, P(A∪B) is:

A. 0.12

B. 0.58

C. 0.7

D. 0.1

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Correct Answer: Option C

Explanation:
Since A and B are mutually exclusive, P(A∪B) = P(A) + P(B) = 0.7.

This question belongs to: Accountancy and Statistics Statistics

Question #2

Net Reproduction Rate (NRR) adjusts for:

A. Mortality of women up to reproductive age

B. Only fertility

C. Migration

D. Male mortality

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Correct Answer: Option A

Explanation:
NRR takes into account that some women may die before completing childbearing.

This question belongs to: Accountancy and Statistics Statistics

Question #3

The population of India in 2023 is estimated to be:

A. 1.2 billion

B. 1.5 billion

C. 1.4 billion

D. 1.3 billion

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Correct Answer: Option C

Explanation:
India's population surpassed 1.4 billion around 2023.

This question belongs to: Accountancy and Statistics Statistics

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