Permutations Calculator

Calculates the number of permutations of r objects that can be chosen from a set of n objects, nPr.

n: The number of objects to choose from.
r: The number of objects to chosen from set n.

Example

Compute the permutation of 2 cards possible from a deck with 47 cards.

Value	Keystrokes	Display	Description
47	n	47.00	Stores the n value.
2	r	2.00	Stores the r value
	npr	2,162.00	Calculates the number of permutations.

Due to the nature of this function, it is difficult to solve for the n or r values.

Reference: