How are CA and exams added together for your final grade?

Hello I'm doing my real GCSEs in a few months and I'm wondering
If 25% Controlled Assessments
And 75% Exam
How are the grades added together?
Like say you got an E in your controlled assessment but an B/A in exam, what would your grade be?

Thanks

If you got, say, 45% (middle E) in the CA and 75% (middle B) in the exam, you'd get:

0.25 * 45 + 0.75 * 75 = 67.5% = High C.

So I imagine with a good A you could get a B overall

Thank you! That was very helpful, indeed. I'm just thinking of the worst case scenario, if you failed one of your controlled assessments, but did really good on the exam (let's say 75% = middle B, like you said)

Would that mean you get the middle B or would that be knocked down by your failed CA, or just fail it all together? : O
Lol

I hope I'm not asking too many questions, as I'm a really nervous person - especially when it's comes to grades or exams ^^

That's actually reassuring. I think I'm fine with all my other CAs/subjects if I keep a good rigid, revision timetable for my real exams, but I find one subject slightly challenging: Business.

Lmao it's an option I chose in Y10, though it's interesting to say in the least ^^