1. In a bag, there are 8 red marbles and 12 blue marbles. If you draw two marbles without replacement, what is the probability that you draw one red and one blue marble?

2. In a group of 200 people, 120 own a car, 80 own a bike, and 40 own both. What is the probability that a randomly selected person owns either a car or a bike?

3. A fair six-sided die is rolled. What is the probability of rolling a prime number?

4. A box contains 5 red balls, 3 blue balls, and 2 green balls. If two balls are drawn without replacement, what is the probability that they are the same color?

5. A fair coin is tossed 6 times. What is the probability of getting exactly 3 heads?

6. A box contains 5 red balls, 3 blue balls, and 2 green balls. If you draw three balls without replacement, what is the probability that you draw at least one red ball?

7. If you roll a fair six-sided die three times, what is the probability of rolling at least one 6?

8. A fair six-sided die is rolled. What is the probability of rolling a number less than 4 or an even number?

9. In a standard deck of 52 cards, what is the probability of drawing a red card or an ace?

10. If you draw two cards from a standard deck without replacement, what is the probability that both are aces?