. This is read as
"n choose k".The number of combinations is found using the binomial coefficient: . This is read as
"n choose k".
| Steps | Key Sequence | Screens |
| 1. Suppose we want to find 6 choose 2. | Type 6 | |
| 2. Find nCr function | MATH |  |
 three times |
 |
|
| 3 (for nCr) |  |
|
| 3. Evaluate nCr function | 2, then ENTER |  |