\(\textit{Citations}\)

Benjamin, A. T. (2009). \(\textit{Discrete Mathematics}\). Chantilly, Virginia: The Great Courses.

Schultzkie, L. (2012). Combinations. Retrieved January 28, 2016, from http://www.regentsprep.org/regents/math

Weisstein, Eric W. “Binomial Coefficient.” From MathWorld–A Wolfram Web Resource.