The probability of getting 9 cards of the samesuit in one hand at a game of bridge is:

$$\frac{\left(\begin{array}{c}13\\ 9\end{array}\right) \times \left(\begin{array}{c}39\\ 4\end{array}\right) \times 4}{\left(\begin{array}{c}52\\ 13\end{array}\right)}$$

$$\frac{\left(\begin{array}{c}13\\ 9\end{array}\right)}{\left(\begin{array}{c}52\\ 13\end{array}\right)}$$

$$\frac{\left(\begin{array}{c}13\\ 9\end{array}\right)\times 4}{\left(\begin{array}{c}52\\ 13\end{array}\right)}$$

$$\frac{\left(\begin{array}{c}13\\ 9\end{array}\right) \times \left(\begin{array}{c}39\\ 4\end{array}\right)}{\left(\begin{array}{c}52\\ 13\end{array}\right)}$$