Syntax: PERMUT(N, K)
N = Number of objects to choose from
K = Number of objects to be chosen
PERMUT returns ``N choose K'', or the permutations of K objects that can be chosen from the set N, where order is significant.
Examples:
PERMUT(10, 4) = 5040
PERMUT(8, 1) = 8
Excel function: PERMUT