<p>I’m pretty sure I read about this somewhere, or one of the financial aid officers told me about this. But even still, if you look at the average financial aid award to students for the class of 2014, between 0-60k family income, roughly 51-52k of the annual cost was covered, while between 60k-100k family income, roughly between 41-45k of the annual cost was covered. These would cover the total cost, and the tuition respectively.
[Duke</a> Financial Aid: Award Statistics](<a href=“http://dukefinancialaid.duke.edu/undergraduate/stats/index.html]Duke”>http://dukefinancialaid.duke.edu/undergraduate/stats/index.html)</p>