No it just means that you are assigned to 310 and if you have a roommate, he/she would be 310B. It has nothing to do with which bed you need to sleep on, you can decide that with your roommate.
No it just means that you are assigned to 310 and if you have a roommate, he/she would be 310B. It has nothing to do with which bed you need to sleep on, you can decide that with your roommate.