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\nCalculate Combinations (nCr) using HP Prime
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\n Use this calculator to compute combinations (nCr) for the HP\n Prime calculator, find the number of ways to choose r items from a\n set of n items.\n
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Explanation
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\n The combinations formula (nCr) calculates the number of ways to\n choose r items from a set of n items without regard to order. The\n formula is:\n
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nCr = n! / (r! * (n – r)!)
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| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| n | Total number of items | Dimensionless | 0 to 100 |
| r | Number of items to choose | Dimensionless | 0 to n |
| n! | Factorial of n | Unitless | 1 to 100! |
| nCr | Combinations result | Unitless | 0 to 100C50 |
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