Answer:
2%
Step-by-step explanation:
In this case each one is an independent event, therefore, the multiplication of each one would be the final probability
We have 5 Red Marbles, 4 Green Marbles, and 3 Blue Marbles, that is, there are 5 + 4 + 3 12 Marbles in total.
Now if I draw a red one, the probability would be: 5/12
When drawing another red, the probability would be: 4/11
When taking the green: 4/10
When removing the blue: 3/9
Finally, the final probability is:
P = (5/12) * (4/11) * (4/10) * (3/9)
P = 0.020
In other words, the probability of this happening is 2%