A geologist mixes 10 rocks with fossils into a bag with 90 other similarly sized rocks that do not contain fossils. She then removes 20 rocks from the bag at random. A) What is the probability she will get exactly 3 fossils? B) What is the probability she will get less than 3 fossils? C) What is the probability she will get at least 4 fossils? (Hint: Use the indirect method)