Which of the following statements about an Event A are true? I. The probability that Event A will occur can be negative. II. The sum of the probability that Event A will occur and the probability that Event A will not occur is always equal to 1. III. The probability of Event A must be between 0 and 1 inclusive.

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Which of the following statements about an Event A are true? I. The probability that Event A will occur can be negative. II. The sum of the probability that Event A will occur and the probability that Event A will not occur is always equal to 1. III. The probability of Event A must be between 0 and 1 inclusive.