An experiment consists of rolling a fair die. Event A = {2, 4, 6} and Event B = {3, 6}. What is P(A ∪ B)? MCQ with Answer and Explanation

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An experiment consists of rolling a fair die. Event A = {2, 4, 6} and Event B = {3, 6}. What is P(A ∪ B)?

A. 2/3

B. 1/3

C. 1/2

D. 5/6

Answer: Option A

Solution (By JKSSB Mock Tests)

A ∪ B = {2, 3, 4, 6}. Four favorable outcomes. P(A ∪ B) = 4/6 = 2/3.

This question belongs to: Accountancy and Statistics Statistics

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A Census aims at:

A. Sample enumeration

B. Collecting income data only

C. Recording only births

D. Complete enumeration of the population

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Correct Answer: Option D

Explanation:
Census is the process of collecting data about every individual in the country at a specific point in time.

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Question #2

The harmonic mean of 4 and 12 is:

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C. 3

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Correct Answer: Option B

Explanation:
HM = 2 / (1/4 + 1/12) = 2 / (4/12) = 2 / (1/3) = 6.

This question belongs to: Accountancy and Statistics Statistics

Question #3

If each value in a dataset is increased by 10, which of the following measures remains unchanged?

A. First quartile

B. Range

C. Median

D. Mean

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Correct Answer: Option B

Explanation:
Range depends on difference between max and min; both increase by 10, so range unchanged.

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