TI-83 Resource Website
|Quick Steps||Step-by-Step||Related Links||Print Version|
The TI-83 can calculate the number of combinations or arrangements possible.
Example: Find the number of ways you can choose five people from a class of twenty. Note that n = 20 and r = 5. ( If you have any questions, see your instructor.)
Step 1:.Enter n.
In this example, n = 20.
Step 2: Press MATH.
Step 3: Using the right blue arrow button, highlight PRB. The PRB menu should appear.
Step 4: Using the down blue arrow, select 3:nCr
Step 5: Press ENTER. You will be taken back to the home screen.
Step 6: Enter r.
In this example, r = 5.
Step 6: Press ENTER. The result will appear.
Interpreting the results: There are 15504 possible ways to choose five students out of a class of twenty students.
This site was last updated 10/10/02 and is maintained by Donna L. Sperry