Service tax doubt

Service tax and Vat comes for 40 marks in total.As per trend service tax generally comes for 22 marks But since in FA 2012 there are  lot of changes in service tax...it is expected to come for about 30 marks

As service tax is changed videly beacuse of introduction of negative list

so chances of increase in weightage of service tax are there. Service tax can be expected around 20-28 marks.