Final answer:
The probability of drawing a green stone is 0.3 or 30%.
Step-by-step explanation:
To find the probability of drawing a green stone, we need to determine the number of green stones in the bag and divide it by the total number of stones. In this case, there are 3 green stones out of a total of 10 stones.
So, the probability of drawing a green stone is:
3/10 = 0.3
Therefore, the probability of drawing a green stone is 0.3 or 30%.