Three of the choices describe the ratio of blue marbles to red marbles. Which choice does NOT?
6 blue marbles and 9 red marbles
2 to 3
6 blue marbles:9
red marbles
9:12
12 blue marbles18 red marbles
6 blue marbles and 9 red marbles
2 to 3
6 blue marbles:9
red marbles
9:12
12 blue marbles18 red marbles