Combinations (n choose r): 12 n n; 1 r r
Specific conversion page with reference context, calculator, and nearby values.
Table of Contents
12 n n; 1 r r converts to
12 Combination Count
Use this as a quick reference for Combinations (n choose r).
Value Details
Input: 12 n n; 1 r r
Output: 12 Combination Count
Combinations (n choose r)
Calculate the number of combinations using nCr for integers with 0 ≤ r ≤ n ≤ 18.
Calculated Result
—
Nearby Reference Values
| Scenario | nCr |
|---|---|
| 10 n n; 0 r r | 1 Combination Count |
| 10 n n; 1 r r | 10 Combination Count |
| 10 n n; 2 r r | 45 Combination Count |
| 10 n n; 3 r r | 120 Combination Count |
| 10 n n; 4 r r | 210 Combination Count |
| 10 n n; 5 r r | 252 Combination Count |
| 10 n n; 6 r r | 210 Combination Count |
| 10 n n; 9 r r | 10 Combination Count |
| 10 n n; 10 r r | 1 Combination Count |
| 12 n n; 0 r r | 1 Combination Count |
| 12 n n; 1 r r | 12 Combination Count |
| 12 n n; 2 r r | 66 Combination Count |
| 12 n n; 3 r r | 220 Combination Count |
| 12 n n; 4 r r | 495 Combination Count |
| 12 n n; 5 r r | 792 Combination Count |
| 12 n n; 6 r r | 924 Combination Count |
| 12 n n; 11 r r | 12 Combination Count |
| 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 |
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
This page is generated from the same conversion definition used by the main calculator page, which keeps the calculator, reference table rows, and FAQ schema aligned.
Reviewer and update metadata are shown above and included in structured data. See our editorial policy, review process, and corrections policy.
Use this page as a fast lookup reference, then confirm final project values using applicable standards and manufacturer documentation.