Class 11 timetable now clashes with her Saturday art class. She wants to keep art

My daughter has just started class 11 (ISC, science). The school has added Saturday morning sessions, which clash with the art class she has attended since she was nine. She would like to keep art and move it to Sunday, even if it means a tighter weekend. Her tuition teacher thinks she should drop it this year. I am inclined to let her keep it, because art is the only part of her week without marks attached, but I am aware that I am not the one doing the work. If your child kept a non-academic class through class 11 and 12, how did the weekly routine look? I am asking about the cost as much as the benefit.