Answer: A) 3/10
This is the probability of winning 0 dollars, aka not winning any cash prizes. So all we do is write down the probability value found in the first column.
side note: you could add all the other probabilities to get 1/5+1/10+2/5 = 2/10+1/10+4/10 = 7/10, then subtract that from 1 to get 1-7/10 = 10/10-7/10 = 3/10. Though this is a bit more work than needed in this problem.
