If the probability of occurrence of an event is 0.9, then what is the probability of its non-occurrence?
P(occurrence of an event)= 0.9
P(non- occurrence of an event) = 1 – P(occurrence of an event)
= 1 – 0.9
= 0.1
If the odds in favour of an event be 3 : 5, then the probability of non-occurrence of the event is