Conditional probability P(A|B) is defined only when: MCQ with Answer and Explanation

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Conditional probability P(A|B) is defined only when:

A. P(A) > 0

B. A and B are mutually exclusive

C. P(B) > 0

D. A and B are independent

Answer: Option C

Solution (By JKSSB Mock Tests)

The definition P(A|B) = P(A∩B)/P(B) requires P(B) > 0.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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A sample space has 6 equally likely outcomes. The probability of an event with 2 outcomes is:

A. 1/3

B. 1/2

C. 1/6

D. 2/3

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Correct Answer: Option A

Explanation:
P = 2/6 = 1/3.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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If a dataset has mean = 25 and median = 25, the distribution is likely:

A. Negatively skewed

B. Symmetric

C. Cannot say

D. Positively skewed

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Correct Answer: Option B

Explanation:
Mean = Median suggests symmetry, but not guaranteed without mode; however, in many contexts it indicates symmetry.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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The mode of a dataset is the value that:

A. Is the average

B. Is the minimum

C. Occurs most frequently

D. Lies in the middle

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Correct Answer: Option C

Explanation:
Mode is the most common observation.

This question belongs to: Accountancy and Statistics Statistics

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