python numpy ndarray element-wise mean : <p>I'd like to calculate element-wise average of numpy ndarray.</p>

<pre><code>In [56]: a = np.array([10, 20, 30])

In [57]: b = np.array([30, 20, 20])

In [58]: c = np.array([50, 20, 40])
</code></pre>

<p>What I want:</p>

<pre><code>[30, 20, 30]
</code></pre>

<p>Is there any in-built function for this operation, other than vectorized sum and dividing? </p>
