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Probability Calculator

Calculate probabilities for common scenarios

3/10
Fraction
0.3
Decimal
30%
Percentage
3:7
Odds For
7:3
Odds Against
70%
Complement

Combinations & Permutations

120
nCr (Combinations)
720
nPr (Permutations)

How it works

  • Calculate probability as fraction, decimal, and percentage
  • Shows odds for/against and complement
  • Includes combinations (nCr) and permutations (nPr)

Want to learn more?

Read the complete guide with examples and tips

Read guide