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

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

A. 0.1

B. 0.12

C. 0.7

D. 0.58

Answer: Option C

Solution (By JKSSB Mock Tests)

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

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

The sample space for rolling a die once contains:

A. 36 outcomes

B. 12 outcomes

C. 6 outcomes

D. 3 outcomes

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Correct Answer: Option C

Explanation:
A standard die has six faces: 1,2,3,4,5,6.

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Question #2

If a dataset has values ranging from 10 to 95 and you decide to use a class width of 10, how many classes would be needed for an exclusive frequency distribution?

A. 9

B. 11

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Correct Answer: Option A

Explanation:
Range = 95 - 10 = 85. Number of classes = Range / Class width = 85 / 10 = 8.5, rounded up to 9 classes to cover the entire data range without gaps.

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Question #3

An index number constructed by taking the simple average of price relatives is called:

A. Simple average of relatives index

B. Chain index

C. Simple aggregative index

D. Weighted aggregative index

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Correct Answer: Option A

Explanation:
It is calculated as the arithmetic or geometric mean of individual price relatives.

This question belongs to: Accountancy and Statistics Statistics

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