A fair die is rolled. What is the probability of rolling a 3 or a 5?
There are 6 possible outcomes when rolling a fair die, which are the numbers 1, 2, 3, 4, 5, and 6. Out of these 6 outcomes, only 2 of them are the desired outcomes, which are the numbers 3 and 5.
Therefore, the probability of rolling a 3 or a 5 is 2/6, which simplifies to 1/3, or approximately 0.3333.