From a barrel of colored marbles, you randomly select 7 blue, 5 yellow, 8 red, 4 green, and 6 purple marbles.

1. find the experimental probability of randomly selecting a marble that is not yellow.

a. 1/30
b. 5/6
c. 2/15
d. 1/6

2. find the experimental probability of randomly selecting a marble that is either green or purple.

a. 1/10
b. 1/5
c. 1/3
d. 2/15