Additional Mathematics 0606 / Permutations and combinations / 4.054.05: Combination equation0606/13/M/J/26 — Question 7 · 4 marksMark as done · Save for later · Show official mark schemeGiven that \(\binom{20}{r}=\dfrac43\binom{20}{r+1}\), find \(r\).[4]▸ AnswerSee the official mark scheme below.▸ Official mark scheme
