## Elementary Statistics (12th Edition)

a) 240 b)495 c) $\frac{1}{120}$
a) Because the order is important, we can use the permutation rule to determine the number of possibilities: $\frac{16!}{(16-14)!}=240.$ b)Because the order is not important, we can use the combination rule to determine the number of possibilities: $\frac{16!}{(16-14)!14!}=120.$ c) By using the properties of b), and we also know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$, therefore $P=\frac{1}{120}$.