Evaluate $5!$5!
Evaluate $4!6!$4!6!
Find the value of $\frac{11!}{5!6!}$11!5!6!.
Simplify $\frac{19!}{15!4!}$19!15!4! by identifying common factors of the numerator and denominator.
random experiments, sample spaces, outcomes, elementary and compound events, random variables and the distribution of results of experiments
addition and multiplication principles for counting
combinations including the concept of a selection and computation of nCr and the application of counting techniques to probability.
counting techniques and their application to probability