1. Probability of an event E + Probability of the event ‘not E’ = __________.
2. The probability of an event that cannot happen is ________ . Such an event is called ________.
3. The probability of an event that is certain to happen is ________. Such an event is called ________.
4. The sum of the probabilities of all the elementary events of an experiment is ________.
5. The probability of an event is greater than or equal to and less than or equal to ________.

Solution:-