In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data:
dice:
6 sided
Step 02:
simple probability:
simple probability = favorable outcomes / total outcomes
favorable outcomes (prime numbers: 2, 3, 5) = 3
total outcomes = 6
probability (prime number) = 3 / 6 = 1 / 2
The answer is:
1 / 2 = 0.5