If Suresh had scored 20 marks in Accounts and 45 marks in Finance, then the marks scored by all six students in internals of these 2 subjects would be (All marks, at all stages of evaluation, have to be integers. So, round off any decimal to the next higher number)
63
62
59
61
63
Suresh scoring 20 marks in Accounts implies that the total marks scored by all six students put together would be 400 as his marks constituted 5% of the total marks.
Similarly, the total marks scored by all six students put together in Finance would be 150 as his marks constituted 30% of the total marks.
The results can be tabulated as shown above.
∴ the total marks scored by all six students in the internals of Finance are 13 and that in Accounts is 50.
∴ the required total is 63.