The number of different ways in which 2n students can be paired up is on) (n!) O (27) (n!). OC) (n!) OC)(n!). O (2n - 1)(2n - 3)(2n - 5)...1 Q9 Balls 3 Points Box 1 contains 9 balls named 1 through 9. Box 2 contains 6 identical balls all named O. You have an empty box 3. You need to put 5 balls from Box 1 and 4 balls from box 2 into the final box. How many different ways are there to do this? (Hint: the order in box 3 does not matter) O C(9,5). C(6,4) O P(9,5). C(6,4) O C(9,5) O C(6,4) How many anagrams does "banana" have in which the three a's are next to each other? (An anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.) 06 O 12 20 O 24 Q11 Basketball 3 Points In order to play a game of basketball, 6 children at a playground divide themselves into two teams of 3 each. How many different divisions are possible? )/2 3!3! O ()3