title: Need to find the relative frequencies
body: <p>Cannot find out why this is not working?:</p>
  
  <pre><code>def frequencies(counts):    
      total = sum(counts)
      frequencies = []    
      for count in counts:
          frequencies.append(float(count/total))    
      return frequencies
  </code></pre>
  
  <p>It should take a list of intergers as argument and return a list of relative frequencies. </p>