Answer:
P(even number) =

Explanation:
the probability (P) of an event occurring is
P = ( desired outcome ) / (number of possible outcomes )
here the desired outcome is an even number , that is 2, 4, 6 ( 3 outcomes )
and possible outcomes are 1, 2, 3, 4, 5, 6 , that is 6 outcomes
Then probability of an even number when a single die is thrown is
P ( even number ) =
=
