Question

What is the value of 12C5 ?









A.
95,040







B.
60







C.
792







D.
120

Answer 1

http://www.wolframalpha.com/input/?i=12+choose+5

Answer 2

C

Answer 3

\[\left(\begin{matrix}n \\ k\end{matrix}\right) = \dfrac{n!}{k!(n-k)!}\]

Answer 4

\[_{12}C_5=\frac{\overbrace{12\times 11\times 10\times 9\times 8}^{\text{ five terms }}}{5\times 4\times 3\times 2}\]
cancel first, multiply last, or use wolfram