Question -
Answer -
(i) Probability ofan event E + Probability of the event ‘not E’ = ___________.
(ii) The probabilityof an event that cannot happen is __________. Such an event is called ________.
(iii) Theprobability of an event that is certain to happen is _________. Such an eventis called _________.
(iv) The sum of theprobabilities of all the elementary events of an experiment is __________.
(v) The probabilityof an event is greater than or equal to and less than or equal to __________.
Solution:
(i) Probability of an event E + Probability ofthe event ‘not E’ = 1.
(ii) The probability of an event that cannothappen is 0. Such an event is called an impossible event.
(iii) The probability of an event that iscertain to happen is 1. Such an event is called a sure or certainevent.
(iv) The sum of the probabilities of all theelementary events of an experiment is 1.
(v) The probability of an event is greaterthan or equal to 0 and less than or equal to 1.