Well, I replied to you before...but I'll take another stab at it.
Fixed-wing slots are given out at the end of Primary (T-34C) training, along with helo and prop assignments.
The only way for you to ensure you get a FW slot is to finish first in your assignment group (used to be made up of all the Primary students that finished in any given weekly or biweekly selection period).
The number of FW to RW to Prop slots is based on the Marine Corps' projection of how many pilots they'll need of each flavor at the end of the training pipeline (flight school and fleet replacement squadron training). That is normally a year to a year and a half in the future. To say that in a different way, the Marine Corps projects replacement requirements for a pipeline selection group based on what they think will be needed when the students have completed training and are assigned to their first fleet squadron. As such, this projection is smoke and mirrors, and it is greatly effected by training delays (say for example if all the Harriers go down for 6 months, then the FW pipeline backs up and they assign fewer FW slots back at primary to compensate).
So, I hope you can see that because of this system - it is impossible to say with any confidence what the breakout of slots will be for any given student. In general, the #1 guy gets his choice, after that, the Marine Corps makes assignments based on your choice versus needs of the Marine Corps. If you select FW/Prop/Helo in that order, and all they have are Helo slots, guess what you are going to get?
That is why the last time you asked this question, everyone told you that you needed to be focused on being a Marine first and a pilot second, because once you've signed on the line, you're in for the duration, whether you get your choice of platform or whether you finish flight school at all. Not everyone does - some folks wash out, some go NPQ (lose their medical), some don't like it and drop. When you sign up for a Marine flight program, you also need to be ready to be a Motor T officer and be happy about it. If you don't think you can pull that off, don't join the Marine Corps.
Semper fi,