Probability of not and and or events

The probability of ‘n’ independent events are P_(1) , P_(2) , P_(3) ……., P_(n) . Find an expression for probability that at least one of the events will happen.

The probability of not happening of an event is 0.63 . The probability of happening of that events is

The probability of happening of an event is 3/5 . Find the probability of not happening the event.

What is the probability of a sure event?

Probability of occurring of an event always lies between _____.

Probability of happening of an event in an experiment is 0.4. The probability of happening of the event atleast once,if the experiment is repeated 3 xx under similar condition is

The probabilities of two events are 0.25 and 0.50. The total probability of both happening together is 0.14. The probability of none of the events happening ?

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 an impossible event