I was hoping you could explain these permutation/combination questions. Thank you!

gle.com/u/1/c/MTlyNTAyMDY5MD15/a/MzQ5 14 You need to create a group of 12 students from 6 freshmen, 5 sophomores, 7 juniors and 8 seniors. How many different groups can you make with 3 students from each grade level? 15 What is the probability that Macy, who is a sophomore, gets chosen? 46 If there are no restrictions on the number of students from each grade, what is the probability that all 8 seniors are chosen? 17. If there are no restrictions on the number of students from each grade, what is the probability that all 8 seniors or none of the seniors are chosen? 49. How many ways are there to choose 10 songs to download to a playlist from a list of 32. 32P10=2.34E x 10^14 19. How many ways are there to rank your top 5 movies in order of preference from 100 available to add to a list. 100P5=9034502400 20. How many ways are there to elect a committee chair and co-chair from a group of 25 participants. 25P2=600 21. How many ways are there to choose a group of 4 students from the class roster of 35 for a project. 35C4=52360 zz. You are dealt a 7 card hand. How many hands are possible? 52P7= 6.74E x 10^11 23 What is the probability that you will be dealt 7 cards of one suit? 24. What is the probability that you will be dealt 2 pair? (2 sets of matching cards and the others don't match) Page 2 / 2 25. How many ways can you specify when negative integers such that the hon-negative integers add up to 48? 27 1 97453 MacBook Air 20 44 DD FO F10 # $ & 2 W 4 5 6 7 O W E R T Y U O P S D F G H K X C V B N M