<p>I know that CMU lets you double major, but i am wondering about the feasibility of double majoring, and in these subjects in particular. would it be an insane amount of work, or would it be doable. not easy, but doable. in general are biology and/or physics one of the more difficult majors (i'm guessing that physics probably is)? and if anyone knows about what fraction of students double major, and what portion of those still graduate in four years that would be great too.</p>
<p>thanks.</p>