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Answer:
(a) The probability of an event A that is certain to occur is 1.
(b) The probability of an event B that is impossible is 0.
Step-by-step explanation:
The probability of an event can be described as the chance that the event will occur.
The probability that an event will occur is between 0 and 1.
Based on the above, we can answer as follows:
(a) What is the probability of an event A that is certain to occur?
The probability of an event A that is certain to occur is 1.
(b) What is the probability of an event B that is impossible?
The probability of an event B that is impossible is 0.