The table given below shows the marks obtained by two students in 6 subjects.

What is the difference between the total marks obtained by A and B in all the 6 subjects?

30

Total marks obtained by A = 180 + 240 + 360 + 300 + 60 + 330 = 1470

Total marks obtained by B = 90 + 420 + 390 + 210 + 270 + 120 = 1500

Difference in marks of A & B = 1500 - 1470 = 30