If A and B are independent, then P(A|B) equals: MCQ with Answer and Explanation

If A and B are independent, then P(A|B) equals:

A. P(B)

B. P(A∩B)

C. P(A)

D. P(A) + P(B)

Answer: Option C

Independence means the occurrence of B does not affect the probability of A.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

In a frequency distribution with exclusive class intervals 0-10, 10-20, 20-30, a value exactly equal to 20 should be included in:

A. 20-30

B. Excluded from both

C. Either 10-20 or 20-30

D. 10-20

Correct Answer: Option A

Explanation:
In exclusive classification, the upper limit is excluded; thus 20 belongs to the class 20-30.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

If two events are complementary, then:

A. P(A∩B) = P(A)P(B)

B. They are independent

C. P(A) = P(B)

D. They are mutually exclusive and exhaustive

Correct Answer: Option D

Explanation:
Complementary events partition the sample space.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

Which average is most appropriate for averaging ratios and rates when the denominators are variable?

A. Weighted arithmetic mean

B. Arithmetic mean

C. Harmonic mean

D. Median

Correct Answer: Option A

Explanation:
When denominators vary, a weighted mean using denominators as weights is appropriate.

This question belongs to: Accountancy and Statistics Statistics