P≤ft(B/A) is defined only when

Correct Answer is : AAA is not an impossible event

Correct Answer is : AAA is not an impossible event

Test Index

Probability

Question : 19 of 127

Marks: +1, -0

P\left(\frac{B}{A}\right)

is defined only when

Solution:

Concept:

Conditional probability

P(B|A)

is defined only when

P(A) > 0

Explanation:

The formula for conditional probability is

P(B|A) = \frac{P(A \cap B)}{P(A)}

P(A) = 0

, the denominator becomes zero, making the expression undefined.

Thus,

P(B|A)

is defined only when

A

is not an impossible event (i.e.,

P(A) > 0

Answer:

Option C:

A

is not an impossible event.

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