What is event occurrence of event

Occurrence of an event

The probability of an occurrence of event A is .7 and that of the occurrence of event B is .3 and the probability of occurrence of both is .4.

The probability of an occurrence of event A is 0.7 and that of the occurrence of event B is 0.3 and the probability of occurrence of both is 0.4.

The probability of an occurrence of event A is 0.7 and that of the occurrence of event B is 0.3 and the probability of occurrence of both is 0.4.

Probability of occurrence of event and non occurrence of an event

The odds in favour of occurrence of an event are 2:5 . Find the probability of the occurrence of the event.

The odds against of the occurrence of an event are 4:5 . Find the probability of the occurrence of the event.

The probability of the non-occurrence of an event is 2/7 . Find the probability of the occurrence of the event.

The probability of non-occurrence of an event is 5/12 . Find the probability of the occurrence of the event.