Javascript - How to get the sum of the index[1] elements from a 2D array
<p>Working on a homework assignment for my development class.
Part of my problem requires me to create a multidimensional array (2D) and get the sum of the second element from each nested array. How can i achieve this? Here is my array:</p>

<pre><code>var studentGrades = [['Bob', 85], ['Jim', 76], ['Steve', 92], ['Sue', 83], ['Liz', 65], ['Jack', 77], ['Jo', 96], ['Tim', 80], ['Mike', 53], ['John', 81]];
</code></pre>

<p>I need to get all the numbers added together.
I realize their index is [1], but I don't know how to write the code to add these together.</p>
