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if you do want to tripple major i think MIT's curve will be too intense for your heavy courseload.
You actually can't triple at MIT -- it's not allowed.</p>
<p>But about 20% of MIT students (including me) double-major -- although, as sakky said above, the return on a double isn't as great as the work you're putting into it.</p>
<p>And for the OP, graduate students in the sciences rarely get master's degrees -- most people apply to PhD programs with only a bachelor's, either straight out of college or after a few years doing technical work in a lab.</p>