If A and B are independent events with P(A)=0.5, P(B)=0.4, P(A∪B) is: MCQ with Answer and Explanation

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If A and B are independent events with P(A)=0.5, P(B)=0.4, P(A∪B) is:

A. 0.9

B. 0.2

C. 0.5

D. 0.7

Answer: Option D

Solution (By JKExamLibrary)

P(A∪B) = 0.5 + 0.4 - (0.5×0.4) = 0.9 - 0.2 = 0.7.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1 Report Error

Which of the following is an example of secondary data?

A. Data collected by a student for her project through a survey

B. Observations recorded in a lab experiment

C. Interviews conducted by a journalist

D. Data obtained from the Census of India website for a research paper

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Correct Answer: Option D

Explanation:
Data already published is secondary.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

The weighted arithmetic mean formula is:

A. Σwx / n

B. Σw / Σwx

C. Σwx / Σw

D. Σx / Σw

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Correct Answer: Option C

Explanation:
Weighted mean = Σ(w_i × x_i) / Σ w_i.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

Two events are mutually exclusive if they:

A. Can occur together

B. Cannot occur together

C. Have equal probabilities

D. Always occur together

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Correct Answer: Option B

Explanation:
Mutually exclusive events have no common outcome; P(A∩B) = 0.

This question belongs to: Accountancy and Statistics Statistics

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