They are both likely to happen (even or odd)
1) Considering that 1 dice has the following numbers:
1 -2 -3 -4 -5 -6 six numbers
3 odd numbers: 1, 3, 5 three numbers
3 even numbers: 2, 4, 6 three numbers
2) Then we can write:

3) Hence, there are equal chances to get an even and an odd number when we roll a dice (six-sided number cube).