Final answer:
The probability of Christine pulling out a green piece of candy is 1/8.
Step-by-step explanation:
The probability of Christine pulling out a green piece of candy can be found by dividing the number of green pieces by the total number of pieces in the bag. In this case, there are 10 green pieces and a total of 20+10+15+25+10=80 pieces in the bag. So, the probability is 10/80, which simplifies to 1/8. Therefore, the probability Christine pulls out a green piece of candy is 1/8.