Knowledge Base

Solution 11701: Calculating Combinations and Permutations on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

How do I calculate combinations and permutations on the TI-89 family, TI-92 family, and Voyage 200 graphing calculators?

The example below will demonstrate how to calculate combinations and permutations on the TI-89 family, TI-92 family, and Voyage 200.

Example:
What are the combinations of 5 choosing 2?

1) On the HOME screen input nCr(5,2)
2) Press [2nd][MATH][7][3]
3) Press [5][,][2][ENTER]

The screen will show 10.

What are the permutations of 5 choosing 2?

1) On the HOME screen input nPr(5,2)
2) Press [2nd][MATH][7][2]
3) Press [5][,][2][ENTER]

The screen will show 20.

Please see the TI-89 family, TI-92 family and Voyage 200 guidebooks for additional information.