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Probability Calculator
Calculate odds, combinations & permutations
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Probability Formulas
P(A) = favorable / total
P(A and B) = P(A) × P(B) (independent)
P(A or B) = P(A) + P(B) - P(A and B)
C(n,r) = n! / (r! × (n-r)!)
P(n,r) = n! / (n-r)!
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How to Use This Calculator
Enter your values above to get instant results.
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