0606 P11 - Jun 2025 - Q12 - 4 marks
7114
In this question \(n\geqslant6\).
Use an algebraic method to show that \({}^{n}\mathrm{C}_5-{}^{n-1}\mathrm{C}_5\) can be written as \({}^{n-1}\mathrm{C}_4\).
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