Probability

Probability of an Event

Probability of any event is the ratio of number of sample points in that event to sample points in sample spaces

Page 122

$$P(A)=\frac{n(A)}{n(S)}$$

where,
$P(A)$ - probability of an event A
$n(A)$ - number of sample points in event A
$n(S)$ - number of sample points in the sample Space