A five-sided solid has the numbers 1, 2, 3, 4, and 5. what is the probability of rolling two five-sided number solids and getting a sum of either a 3 or an 8? user: a bag contains 8 blue marbles, 6 red marbles, and 4 green marbles. what is the probability of selecting a blue marble, replacing it in the bag and then selecting a red marble?