What We Have Discussed

There is use of words like most likely, no chance, equally likely in daily life, are showing the manner of chance and judgement.

There are certain experiments whose outcomes have chance of occurring.

Outcomes of such experiments are known as likely outcomes.

An event is a collection of a specific outcome or some of the specific outcomes of the experiment.

In some random experiments, all outcomes have chance of occurring.

As the number of trials increases, the probability of all equally likely outcomes come very close to each other.

The probability of an event A :

P(A) = Number of favourable outcomes of event ANumber of total possible outcomes

The probability of an event which is certain =

The probability of an event which is impossible =

The probability of an event always lies between and (0 and 1 inclusive).