Study the given graph carefully and answer the question that follows. The graph shows the marks scored by five students in the subjects Math, English and Physics.

What is the difference between the total marks obtained by B and the total marks obtained by A?

90 marks

Total marks of A = 30 + 40 + 50 = 120

Total marks of B = 70 + 60 + 80 = 210

Difference b/w total marks of A & B = 210 - 120 = 90