Evaluate $\nCr{7}{2}$7C2.
Find the value of $\binom{7}{3}$(73).
Find the value of $\binom{10}{9}$(109).
Evaluate $\frac{\nCr{10}{5}}{\nCr{10}{6}}$10C510C6.
(+) Use permutations and combinations to compute probabilities of compound events and solve problems.