The probability of pulling a green marble on the first draw is 5/19.
Since there is no replacement, the probability of pulling a green marble on the second draw is 4/18.
Similarly, the probability of pulling a green marble on the third draw is 3/17.
Therefore, the probability of pulling 3 green marbles in a row is:
(5/19) * (4/18) * (3/17) = 0.0115
So, the probability of pulling 3 green marbles without replacement is 0.0115 or approximately 1.15%.