Combinations (n choose r): 18 n n; 0 r r
Specific conversion page with reference context, calculator, and nearby values.
Table of Contents
18 n n; 0 r r converts to
1 Combination Count
Use this as a quick reference for Combinations (n choose r).
Value Details
Input: 18 n n; 0 r r
Output: 1 Combination Count
Combinations (n choose r)
Calculate the number of combinations using nCr for integers with 0 ≤ r ≤ n ≤ 18.
Calculated Result
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Nearby Reference Values
| Scenario | nCr |
|---|---|
| 12 n n; 12 r r | 1 Combination Count |
| 15 n n; 0 r r | 1 Combination Count |
| 15 n n; 1 r r | 15 Combination Count |
| 15 n n; 2 r r | 105 Combination Count |
| 15 n n; 3 r r | 455 Combination Count |
| 15 n n; 4 r r | 1,365 Combination Count |
| 15 n n; 5 r r | 3,003 Combination Count |
| 15 n n; 6 r r | 5,005 Combination Count |
| 15 n n; 14 r r | 15 Combination Count |
| 15 n n; 15 r r | 1 Combination Count |
| 18 n n; 0 r r | 1 Combination Count |
| 18 n n; 1 r r | 18 Combination Count |
| 18 n n; 2 r r | 153 Combination Count |
| 18 n n; 3 r r | 816 Combination Count |
| 18 n n; 4 r r | 3,060 Combination Count |
| 18 n n; 5 r r | 8,568 Combination Count |
| 18 n n; 6 r r | 18,564 Combination Count |
| 18 n n; 17 r r | 18 Combination Count |
| 18 n n; 18 r r | 1 Combination Count |
Frequently Asked Questions
Common questions about Combinations (n choose r), formulas, and expected usage.
What does the Combinations (n choose r) calculator do?
It helps with counting selections where order does not matter in combinatorics and probability.
What formula does the Combinations (n choose r) calculator use?
nCr = n! / (r!(n-r)!), computed iteratively for stable exact integer results in range.
What inputs are valid?
n and r must be integers with 0 ≤ r ≤ n ≤ 18.
When would I use this?
counting selections where order does not matter in combinatorics and probability
Methodology and Review
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