In the first semester, she scored 80+10 = <<80+10=90>>90 marks in maths
She also scores 90-15 = <<90-15=75>>75 marks in arts in the first semester.
She scored 1/3 marks less in science in the first semester than the second, which is 1/3*90 = <<1/3*90=30>>30
Her score in science in the first semester is 90-30 = <<90-30=60>>60
The total for the first semester is 90+75+60 = <<90+75+60=225>>225
The total for the second semester is 90+90+80 = <<90+90+80=260>>260
The combined marks for all the semesters in 260+225 = <<260+225=485>>485
#### 485