If A, B, C are three events, then what is the probability that at least two of these events occur together?

If A and B are two events,the probability that at most one of these events occurs is

If A and B are two events, the probability that at most one of these events occurs is

If M and N are any two events, then probability that at least one of them occurs is:

If M and N are any two events, the probability that at least one of them occurs is

The odds in favour of an event are 4:3 . The odds against another independent event are 2:3 . What is the probability that at least one of the events will occur ?

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

If A and B are two events, then the probability that one and only one event occurs is -

If A and B are two independent events, then prove that the probability that at least one event will happen will be 1-P(A').P(B') .