Final answer:
Probability is a value between 0 and 1, where 0 represents an impossible outcome and 1 represents a certain outcome.
Explanation:
Probability is a real number between 0 and 1, meaning it cannot be negative. An outcome with a probability of 0 is impossible, while an outcome with a probability of 1 is certain. The sum of probabilities of all possible outcomes in an event must be unity, indicating that one outcome is certain to occur.
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