3 , 4 and 6 are not correct
300=360=380 cause the 8 brings up the 6 and
200=300=100 it will stay the same so
18.81
Half (6.6) base times height (5.7)
2/16 because when you add all the marbles, you get 16 in total and there are 2 red marbles so there is a 2/16 chance of choosing one of the red marbles. If you want it simplified, it would be 1/8.