Algebra · Classes 11, 12
Combinations
Unordered selections of r from n distinct objects.
FORMULA
\({}^nC_r=\frac{n!}{r!(n-r)!}\)
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Worked example
5C2 = 10
Understand this formula
Unordered selections of r from n distinct objects.
Check measurement units, mathematical domains and rounding before applying any result in an examination.