<p>from my response to another thread:</p>
<p>"these schools have painfully competitive admit rates–Andover, for example, is 14%. That means they only pick one in 7 applicants, and the applicants are a high caliber bunch. </p>
<p>Even if you roll a die, you have a better probability of getting a particular outcome."</p>
<p>In you & your sister’s case, you both have to roll the die and end up with the same number AND both be awarded full FA.</p>