Question

if 28C(2r):24C_(2r-4)=225:11
Find r .

Answer 1

\(\large \color{black}{\begin{align}
& \normalsize \text{if }\ ^{28}C_{2r}:^{24}C_{2r-4}=225:11 \hspace{.33em}\\~\\
& \normalsize \text{Find r } \hspace{.33em}\\~\\
& a.) 10 \hspace{.33em}\\~\\
& b.) 11 \hspace{.33em}\\~\\
& c.) 7 \hspace{.33em}\\~\\
& d.) 9 \hspace{.33em}\\~\\
\end{align}}\)