title: Find out the most frequency combination and add labels
body: <p>I have a table with my customer data like this:</p>
  
  <pre><code>Customer    Price
  AAA            100
  AAA            100
  AAA            200
  BBB            100
  BBB            220
  BBB            200
  BBB            200
  </code></pre>
  
  <p>What I want to do is to find out the customer with the condition <code>number of price &gt;= 200 is more than number of price &lt; 200</code> and add labels for them.
  for example:</p>
  
  <pre><code>Customer    LABELS
  AAA            FALSE
  BBB            TRUE
  </code></pre>
  
  <p>any ideas for this issue?</p>