Hey there

CA foundation bis of 400 marks in total having 4 papers each of 100 marks. The Passing criteria is that one should get 40% in each subject and 50% in total. So if you'll get 50 marks in each subject then yeas you can pass but that's a rare case and even 1 marks less can ruin your attempt so focus on more than that.

Check about CA foundation

https://www.google.com/url?sa=t&source=web&rct=j&url=https://finance.careers360.com/articles/ca-foundation/amp&ved=2ahUKEwi5o836ruTkAhVBf30KHWn_D2YQFjAAegQIBRAD&usg=AOvVaw0gnhMKuhxhlQv1oLYT08Pg&ampcf=1

Good luck