(i)Probability of an event E + Probability of the event 'not E'

0
1
2
3

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

Possible event Impossible event

(iii)The sum of the probabilities of all the elementary events of an experiment is

1
2
0
-1

(iv)The probability of an event is greater than or equal to zero and less than or equal to

0
1
2
3