title: Could not find an overload for '/' that accepts the supplied arguments
body: <pre><code>// Playground - noun: a place where people can play
  
  
  func getAverage(numbers: Int...) -&gt; Double{
      var total = 0
      var average:Double = 0
  
      for number in numbers{
          total = total + number
      }
  
      average = total / numbers.count
  
      return average
  }
  
  getAverage(3, 6)
  </code></pre>
  
  <p>I get an error on <code>average = total / numbers.count</code></p>
  
  <blockquote>
    <p>Could not find an overload for '/' that accepts the supplied arguments</p>
  </blockquote>
  
  <p>I tried to fix by doing:</p>
  
  <pre><code>average = Double(total/numbers.count)
  </code></pre>
  
  <p>but then the getAverage was set to <code>4</code> instead of <code>4.5</code></p>