Answer
$\left(\begin{array}{l} n\\ k \end{array}\right)=\frac{n!}{k!(n-k)!}$
$\left(\begin{array}{l} 4\\ 3 \end{array}\right)=\frac{4!}{3!1!}=4$
Work Step by Step
The binomial coefficients can be calculated directly using the formula ___ $ \left(\begin{array}{l} n\\ k \end{array}\right)=\frac{n!}{k!(n-k)!}$ ___. So ___ $ \left(\begin{array}{l} 4\\ 3 \end{array}\right)=\frac{4!}{3!1!}=4$ ___.
