Math
Calculate Permutations and Combinations
Calculate nPr (permutations) and nCr (combinations). How many ways to arrange or choose from a group.
In this article
Difference
Permutation: order matters। Combination: doesnt। 3 from 10 for posts: P(10,3)=720। 3 from 10 for committee: C(10,3)=120। Lottery 6 from 49: C(49,6)=13,983,816। JEE/NEET: 2-3 questions guaranteed।
JEE
PnC: one of highest-weightage algebra topics। Practice previous year problems।
⚡ CalcWolf Insight
The lottery is the most visible application of combinations. Powerball odds (1 in 292 million) mean: if you bought 100 tickets per week, you would expect to win once every 56,000 years. The expected value of a $2 Powerball ticket is about $0.85 — a 57% loss on every dollar played.
Frequently asked questions
Which when?▾
Order matters: permutation। Group without order: combination।
JEE weightage?▾
2-3 questions। High scoring with practice।
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