Answer:
If they played 30 games and won 18, then they lost12, since 30-18 = 12
win:lose
18:12
You can simplify this if you want
18:12
9:6
3:2
BQ)
Marbles:
5 red
3 green
4 yellow
Total marbles = 5 + 3 + 4 = 12.
The probability of picking a green marble is 3/12, since there are 3 green marbles possible to grab and 12 total. 3/12 can be reduced to 1/4, or .25. Devon has a 25% chance of picking a green marble.
Explanation: