When is anyone ever "not being influenced"? There are always factors impinging on any free will decision: your genetics, your level of fatigue, your prior experiences, the shape of your chair... But so what? A decision with absolutely no influences involved is impossible. But influences are not determinations; you may decide to fight your level of fatigue, draw on your prior experiences, ignore the shape of your chair...and so on. The chooser is you. "Influence" is not "determination." Determination is ironclad.Given a choice between two options, a person with free-will is the sole agent for making that choice. This is a reasonable and unremarkable assumption give the fact that the person is not being influenced by some outside agency.
You have provided that outside agency. God as set the ratios. That being the case then probability determines the choice. That probability being the ratio God has already set. For example, 50/50, 75/25, 90/10 or whatever you think it is.
No, no, I'm sorry -- you've completely misunderstood. Perhaps it is my reference to ratios that confused you. You seem to have thought I meant probability ratios. I did not.
I didn't intend even to imply that your choice is contingent on ratios, and I certainly don't think it's true. The ratios is hypothetically suggested did not refer to some "degree of influence," as you seem wrongly to suppose, but to the amount of existing evidence with the entire world. How much of that evidence you may possess, and how you choose to respond to that evidence is entirely up to you. You may, for example, feel yourself possessed of a 50-50 balance of evidence: you feel half of the things you know suggest there is a God, and half not. Or you may believe it's 80-20 against. Or you may decide it's 70-30 for. But in all cases, you may choose to believe or ignore the evidence before you.
So if you choose to believe the balance of pro-God versus anti-God evidence you can find is 50-50, you might choose Agnosticism. But equally, you might decide that it conveniences you to disbelieve in God, so even with a 50-50 ratio, you choose Atheism. Or you could decide that 50% evidence is still pretty concerning, and decide to pursue further evidence on both sides to find out which has more, arriving at the 70-30 ratio, and then deciding to be a Theist. Or you might even realize that Atheism has no evidence at all, but still prefer it for personal reasons. Quantity of evidence can lead a rational person to favour a choice; but no amount of evidence appeals to the hard of heart.
In all scenarios, the amount of evidence does not determine your reaction. Nor does it determine how much of the evidence you are willing to consider. You choose both. You have free will.