Probability of one colour or another

Add the counts for the two colours, then write the total over all the marbles.

1. A bag has 7 red, 5 blue, 8 green and 6 yellow marbles. One marble is picked at random. What is the probability that it is blue or yellow? Write a fraction in lowest terms.
2. A bag has 4 red, 1 blue, 9 green and 3 yellow marbles. One marble is picked at random. What is the probability that it is blue or green? Write a fraction in lowest terms.
3. A bag has 7 red, 4 blue, 8 green and 8 yellow marbles. One marble is picked at random. What is the probability that it is blue or green? Write a fraction in lowest terms.
4. A bag has 2 red, 5 blue, 6 green and 7 yellow marbles. One marble is picked at random. What is the probability that it is blue or green? Write a fraction in lowest terms.
5. A bag has 11 red, 10 blue, 12 green and 1 yellow marbles. One marble is picked at random. What is the probability that it is blue or red? Write a fraction in lowest terms.
6. A bag has 4 red, 8 blue, 11 green and 3 yellow marbles. One marble is picked at random. What is the probability that it is yellow or green? Write a fraction in lowest terms.
7. A bag has 12 red, 2 blue, 8 green and 4 yellow marbles. One marble is picked at random. What is the probability that it is blue or red? Write a fraction in lowest terms.
8. A bag has 12 red, 3 blue, 5 green and 12 yellow marbles. One marble is picked at random. What is the probability that it is yellow or red? Write a fraction in lowest terms.
9. A bag has 10 red, 5 blue, 8 green, 13 yellow and 6 white marbles. One marble is picked at random. What is the probability that it is white or yellow? Write a fraction in lowest terms.
10. A bag has 1 red, 5 blue, 11 green, 15 yellow and 11 white marbles. One marble is picked at random. What is the probability that it is white or red? Write a fraction in lowest terms.
11. A bag has 8 red, 2 blue, 14 green, 3 yellow and 10 white marbles. One marble is picked at random. What is the probability that it is yellow or blue? Write a fraction in lowest terms.
12. A bag has 2 red, 1 blue, 14 green, 14 yellow and 2 white marbles. One marble is picked at random. What is the probability that it is red or yellow? Write a fraction in lowest terms.
13. A bag has 1 red, 13 blue, 20 green, 1 yellow and 6 white marbles. One marble is picked at random. What is the probability that it is yellow or green? Write a fraction in lowest terms.
14. A bag has 13 red, 10 blue, 12 green, 17 yellow and 20 white marbles. One marble is picked at random. What is the probability that it is red or blue? Write a fraction in lowest terms.
15. A bag has 2 red, 2 blue, 11 green, 7 yellow and 19 white marbles. One marble is picked at random. What is the probability that it is green or yellow? Write a fraction in lowest terms.
16. A bag has 8 red, 13 blue, 2 green, 5 yellow and 16 white marbles. One marble is picked at random. What is the probability that it is yellow or red? Write a fraction in lowest terms.
17. A bag has 9 red, 18 blue, 11 green, 19 yellow and 16 white marbles. One marble is picked at random. What is the probability that it is white or blue? Write a fraction in lowest terms.
18. A bag has 16 red, 27 blue, 7 green, 14 yellow and 22 white marbles. One marble is picked at random. What is the probability that it is white or green? Write a fraction in lowest terms.
19. A bag has 29 red, 18 blue, 14 green, 17 yellow and 25 white marbles. One marble is picked at random. What is the probability that it is blue or white? Write a fraction in lowest terms.
20. A bag has 13 red, 16 blue, 20 green, 4 yellow and 8 white marbles. One marble is picked at random. What is the probability that it is green or red? Write a fraction in lowest terms.