1.

Complete the following statements:(i) Probability of an event E + Probability of the event ‘not E’ = ___________.(ii) The probability of an event that cannot happen is __________. Such an event is called ________.(iii) The probability of an event that is certain to happen is _________. Such an event is called _________.(iv) The sum of the probabilities of all the elementary events of an experiment is __________.(v) The probability of an event is greater than or equal to ___ and less than or equal to __________.

Answer»

(i) Probability of an event E + Probability of the event ‘not E’ =       1       .

(ii) The probability of an event that cannot happen is     0    . Such an event is called an impossible event.

(iii) The probability of an event that is certain to happen is       1       . Such an event is called sure event.

(iv) The sum of the probabilities of all the elementary events of an experiment is       1       .

(v) The probability of an event is greater than or equal to      0     and less than or equal to       1       .



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