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Permutations & probability (aptitude) formulas
5 formulas for Permutations & probability (aptitude), from the Arithmetic & Quantitative Aptitude section of the Quantix formula library. Tap 🧮 next to a formula to solve it for any variable with step-by-step working.
| Name | Formula | Note |
|---|---|---|
| Fundamental principle | m ways then n ways ⇒ m × n ways | |
| Arrangements of n distinct objects | n! | |
| Circular arrangements | (n − 1)! | |
| Arrangements with repetition | n! / (p! q! r!) | |
| Probability | P(E) = Favourable outcomes / Total outcomes |
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