Answer :
8:5:3
8 blue marbles to 5 red marbles to 3 green marbles
There are 3 green marbles because the total of 16 marbles minus the blue and red marbles leave 3 marbles left.
8 blue marbles to 5 red marbles to 3 green marbles
There are 3 green marbles because the total of 16 marbles minus the blue and red marbles leave 3 marbles left.