Final answer:
The probability of randomly selecting a green marble from a box with six green marbles and ten yellow marbles is 3/8.
Step-by-step explanation:
To find the probability of randomly selecting a green marble, we need to know the total number of marbles in the box. In this case, there are six green marbles and ten yellow marbles, so the total number of marbles is 6 + 10 = 16.
The probability of selecting a green marble is therefore the number of green marbles divided by the total number of marbles, which is 6/16. This can be simplified to 3/8.
So the probability of randomly selecting a green marble is 3/8.