Express as a fraction the probability of randomly selecting a green marble from a bag. The bag has 5 red marbles, 6 green marbles, 4 yellow marbles, 3 blue marbles, and 2 purple marbles.
The total number of marbles in the bag is 5 + 6 + 4 + 3 + 2 = 20.
The probability of randomly selecting a green marble is 6 (number of green marbles) out of 20 (total number of marbles).
Therefore, the probability of randomly selecting a green marble from the bag is 6/20 which simplifies to 3/10.