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<html>
<h2>Aggregation - Mean</h2>
<p>
  <b>Kata:</b> Compute the mean/average of all elements from an input.
</p>
<br>
<div class="hint">
  Use <a href="https://beam.apache.org/releases/pydoc/current/apache_beam.transforms.combiners.html#apache_beam.transforms.combiners.Mean">
  Mean</a>.
</div>
</html>