Answer
$\begin{pmatrix} 5 \\ 1 \end{pmatrix}=5$
Work Step by Step
Fifth row of Pascal's triangle: $1~~5~~10~~10~~5~~1$
It corresponds to: $\begin{pmatrix} 5 \\ 0 \end{pmatrix}$ $\begin{pmatrix} 5 \\ 1 \end{pmatrix}$ $\begin{pmatrix} 5 \\ 2 \end{pmatrix}$ $\begin{pmatrix} 5 \\ 3 \end{pmatrix}$ $\begin{pmatrix} 5 \\ 4 \end{pmatrix}$ $\begin{pmatrix} 5 \\ 5 \end{pmatrix}$
So, $\begin{pmatrix} 5 \\ 1 \end{pmatrix}=5$
