Study the following graph and answer the question that follows.

Marks scored by five students in three subjects (Maths, English and Physics). Total marks for each subject are 100.

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

30

Total marks obtained by B = 70 + 60 + 80  = 210

Total marks obtained by C = 80 + 70 + 90 = 240

Difference in total marks obtained by B & C = 240 - 210 = 30