4. To raise money for a charity event, a college plans to sell a calendar featuring photos of some of the students. 6 They need to choose six models from a pool of finalists that includes nine women and six men. How many possible choices are there if they want to feature four women? 5. A four-person crew for the international space station is to be chosen from a candidate pool of 10 Americans and 12 Russians. How many different crews are possible if there must be two Russians