if a die is cast what is the probability of getting a prime number?

There are six possible outcomes when rolling a die: 1, 2, 3, 4, 5, or 6. Of these outcomes, three are prime numbers (2, 3, and 5).

Therefore, the probability of getting a prime number when rolling a die is 3/6 or 1/2, which can also be simplified as 0.5 or 50%.