ibution of the number of times <span class="emphasis"><em>not-a-three</em></span>
          is thrown is geometric.
        </p>
<p>
          Geometric distribution has the Probability Density Function PDF:
        </p>
<p>
          &#8192;&#8192; (1-<span class="emphasis"><em>p</em></span>)<sup><span class="emphasis"><em>k</em></span></sup><span class="emphasis"><em>p</em></span>
        </p>
<p>
          The following graph illustrates how the PDF and CDF vary for three examples
          of the succes