If an event cannot occur, its probability is
1
\(\dfrac{3}{4}\)
\(\dfrac{1}{2}\)
0
Step 1: Probability means the chance of an event happening. It is always a number between 0 and 1.
Step 2: If the probability is 1, it means the event is certain to happen.
Step 3: If the probability is 0, it means the event is impossible — it can never happen.
Step 4: The question says “an event cannot occur.” That is exactly the meaning of an impossible event.
Final Answer: The probability of an impossible event is 0. Hence, the correct option is (D).