About Probability & Combinatorics Calculator (nPr & nCr)
Calculate permutations where order matters (nPr), combinations where order does not matter (nCr), single event probabilities, and odds against.
Key Capabilities & Features
- Calculates Combinations: nCr = n! / (r! × (n-r)!)
- Calculates Permutations: nPr = n! / (n-r)!
- Single draw probability and fractional odds ratio display
- Handles large combinatorics sets with instant client-side calculation
How to Use Probability & Combinatorics Calculator (nPr & nCr)
1
Enter Total (n)
Set the total number of items.
2
Enter Chosen (r)
Set how many items are selected.
3
Review Combinatorics
View nCr combinations and nPr permutations.
Privacy & In-Browser Execution Guarantee
All calculations execute 100% in your browser with zero server uploads.
Frequently Asked Questions
What is the difference between combination and permutation?
Permutations care about order (like a safe combination lock 1-2-3 vs 3-2-1). Combinations do not care about order (like a hand of playing cards).
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