What is probability of occurrence of event

1.What is the probability of occurrence of an event?

If A and B are two eveuts, then what is the probability of occurrence of either event A or event B?

If P (E) denotes probability of occurrence of event E, then :

If P (E) denotes probability of occurrence of event E, then :

If the probability of the non-occurrence of an event A is q, then the probability of the occurrence of event A is ..........

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.

The probability of occurrence of an event is 2/5 and the probability of non occurrence of another event is 3/10 if these events are independent then the probability that only one of the two events occurs is