Two events A and B are said to be mutually exclusive if: MCQ with Answer and Explanation

Two events A and B are said to be mutually exclusive if:
A. P(A ∪ B) = 1
B. P(A ∩ B) = P(A) × P(B)
C. P(A ∩ B) = 0
D. P(A|B) = P(A)
Answer: Option C
Solution (By JKSSB Mock Tests)
Mutually exclusive events cannot occur simultaneously, meaning their intersection is the empty set (probability is zero).

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Practice More Statistics Questions

Question #1
Which measure of central tendency can be used for both quantitative and qualitative (nominal) data?
A. Geometric mean
B. Median
C. Mode
D. Arithmetic mean

Correct Answer: Option C


Explanation:
The mode identifies the most frequent category and can be applied to nominal qualitative data (e.g., favorite color), whereas mean and median require at least ordinal or numerical data.

This question belongs to: Accountancy and Statistics Statistics
Question #2
If (A)=60, (B)=50, N=100, the maximum possible value of (AB) is:
A. 100
B. 10
C. 60
D. 50

Correct Answer: Option D


Explanation:
(AB) cannot exceed the smaller of (A) and (B), hence 50.

This question belongs to: Accountancy and Statistics Statistics
Question #3
If P(A|B) = 0.4 and P(B) = 0.5, P(A∩B) is:
A. 0.2
B. 0.9
C. 0.8
D. 0.4

Correct Answer: Option A


Explanation:
P(A∩B) = P(A|B) P(B) = 0.4 × 0.5 = 0.2.

This question belongs to: Accountancy and Statistics Statistics