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How to Compute Permutations and Combinations in GeoGebra

GeoGebra has built-in tools for computing factorials, permutations and combinations, just like your calculator.

GeoGebra Instruction 1

Open CAS under GeoGebra icon View in GeoGebra icon Menu.

  • To compute a factorial, type your number immediately followed by “!” and press Enter.

  • To compute permutations, type nPr. Select the command nPr(<n>, <r>). Enter the total number of elements, and then the number of elements to be drawn from the total. Press Enter.

  • To compute combinations, type nCr. Select the command nCr(<Number n>, <Number r>). Enter the total number of elements, and then the number of elements to be drawn from the total. Press Enter.

Screenshot of GeoGebra showing computations of factorials, permutations and combinations