Answer: B. 80%
Explanation:
P(not green) means that Joseph will pick a marble that is either red, yellow, or purple.
First, we must find the total number of marbles by adding every marble of every color: 2 + 6 + 15 +7 = 30
Now, we need to find the total of marbles that are not green: 2 + 15 + 7 = 24
Now, to solve, we set up this fraction: not green/total marbles = 24/30 = 0.8
0.8 is equivalent to 80% when in percent form. Hope this helps!