P\left( {X = k} \right) = \frac{{\left( \begin{array}{c}
 10 \\ 
 k \\ 
 \end{array} \right)\left( \begin{array}{c}
 100 - 10 \\ 
 5 - k \\ 
 \end{array} \right)}}{{\left( \begin{array}{c}
 100 \\ 
 5 \\ 
 \end{array} \right)}}