It is impossible for me to answer this. It depends on how high the demand is for your choice and when you submit your form. You’ll know in a few months… don’t sweat it.
Direct from ResLife: “Students will be assigned by the order in which they deposited with Rensselaer. If your roommate/s has an earlier deposit date than you, we will group you together and assign you based on the earliest deposits date of the group”