Probability of occurrence of an event ‘A’

= (number of ways to event A occur) / (total number of possible outcomes),

Like we have an event X: A single 6 sided die is rolled, so for finding the probability to getting an even number, we use above Probability Formula:

Probability of occurrence of an event ‘X’

= (number of ways to even number occur) / (total number of possible outcomes),

As we all know there are 3 even Numbers 2, 4, 6 exist on a die,

= 3 / 6,

= 1 / 2.