<p>For what it is worth, a lot of majors at Berkeley are in the 12 to 15 course range, so double majoring with two such majors is certainly possible (if they are similar enough to have considerable overlap, then the total major courses will be fewer than simply adding the number of courses for each major; if they are very different, they will likely cover more of the breadth requirements).</p>
<p>It also means that fitting about 10 courses of pre-med prerequisites around a non-biology major is doable.</p>