14. Which of the following expressions represents the number of distinguishable permutations of the letters of the word ACCOMMODATION?
a. 131
b. 12!
c. 21312121
d. 2121212!
15. If P = (8, r) = 1,680, what is r?
a. 2
b. 3
c. 4
d. 5
16. If P(9, r) = 504, what is r?
a. 3
b. 5
c. 6
d. 7