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Simplify: \(^{n}C_{r} ÷ ^{n}C_{r-1}\)
Question 1
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Simplify: \(^{n}C_{r} ÷ ^{n}C_{r-1}\)
\(\frac{n(n-r)}{r}\)
\(\frac{n}{r(n-r)}\)
\(\frac{1}{r(n-r)}\)
\(\frac{n+1-r}{r}\)
Answer Details
Read lesson note on Permutation And Combinations (WAEC)
Permutation And Combinations
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