Question

a single die rolled, find the probability of rolling an even # or a number less than 5

Answer 1

Let :
\[\Omega=\{1,2,3,4,5,6\}\]
the universe of the possibilities.
let A be the event "rolling an even # or a number less than 5"
then :
\[A=\{1,2,3,4,6\}\]
And we know that :
\[p(A)=\frac{\# A}{\#\Omega}=\frac56\]