SPM – MCQ 105 – Probability of mutually exclusive events
The events A and B are mutually exclusive, so:
A. Prob (A or B) = Prob (A) + Prob (B)
B. Prob (A and B) = Prob (A) * Prob (B)
C. Prob (A) = Prob (B)
D. Prob (A) + Prob (B) = 1
Correct answer : A. Prob (A or B) = Prob (A) + Prob (B)
In mutually exclusive events, the probability of at least one of them occurring will be equal to the sum of their individual probabilities.