A jar contains 3 red marbles, 2 orange marbles, 3 green marbles and 4 blue marbles. One marble is chosen at random

Red: 1/4

Orange: 1/6

Green: 1/4

Blue: 1/3

Step-by-step explanation:

3 red marbles + 2 orange marbles + 3 green marbles + 4 blue marbles = 12 total marbles

3 red marbles / 12 total marbles = 3/12 = 1/4

2 orange marbles / 12 total marbles = 2/12 = 1/6

3 green marbles / 12 total marbles = 3/12 = 1/4

4 blue marbles / 12 total marbles = 4/12 = 1/3