NPr Command

nPr ( <Number n>, <Number r> )

Returns the number of possible permutations without repetition of r elements out of a list of n elements.

nPr(10, 2) yields 90.

CAS Syntax

nPr ( <Number n>, <Number r> )

Returns the number of possible permutations without repetition of r elements out of a list of n elements.

Examples:

  • nPr(10, 2) yields 90.

  • nPr(n, 3) yields \(\frac{n!}\{(n-3)!}\).

See also BinomialCoefficient command.