30. The probability that a specific event, E, happens is denoted P(E) . The probability that this event does not happen is denoted P(not E). Which of the following statements is always true?

Answer and Explanation

Your Answer is

Correct Answer is K

Explanation

Because one thing either happens or does not happen, and the sum of all possible probabilities is 1, so P(E) + P(not E) = 1, so choose K