<li><p>If I am admitted into Columbia through ED, should I withdraw other early applications immediately? or do I reject their offer when the decision comes out?</p></li>
<li><p>Can freshmen at Columbia have a single room? or do all the freshmen get double?</p></li>
</ol>
<ol>
<li><p>No, you're not supposed to wait until decisions come out. You should do it promptly, but not "immediately."</p></li>
<li><p>Not sure on the exact number, but I think it's about 40% of the frosh who get singles.</p></li>
</ol>
<p>if a single is your top priority, request John Jay. there's a housing & dining survey form you fill out later in the year that lets you put down your preferences, and ~85% get their first or second choice.</p>