Answer
$11$
Work Step by Step
Formula to calculate the Binomial Coefficient is:
$\displaystyle \binom{n}{k}=\dfrac{n!}{k!(n-k)!}$
Let's see how this formula works:
$\displaystyle \binom{11}{1}=\dfrac{11!}{1!(11-1)!}=\dfrac{ 11 \cdot 10!}{1 \times 10!}=11$
