can anyone tell me what the raw mark needed to pass will be for a child born in December?

Is the percentage on each area as follows?:
30% maths
20% NVR
50% english (so 25% VR, 25% comprehension/SPAG)

Because my sons biggest weakness is comprehension, i'm wondering if he still has a chance......(I know no one can answer that, but I'm just putting down my thoughts)

The raw score needed will vary with the cohort each year.
As far as the papers go, the following is from the TBGS website:

https://www.thebucksgrammarschools.org/news

Thank you Scary mum, thank God I asked! no idea where I got my percentages from!

On the raw scores, I guess I was hoping to get some idea maybe from previous years scores.