hey,

i hope you are well

while calculating best four subject aggregate for B.Com (//B.Com) you need to include english/hindi and must have secured a minimum aggregate of 60 percent marks in same and rest three subjects should be mathematics, accountancy, economics and business studies/commerce , fallacy in inclusion of any three subject will face a deduction of 1 percent per subject on the aggregate , with a maximum net deduction of 2 percent.

as you want to include english, painting, economics and business studies your aggregate would be 82.75 and as you want to  include painting instead of accountancy then your aggregate would definitely face some percent deduction .

for more information kindly refer to the link mentioned below

https://university.careers360.com/articles/du-bcom-eligibility-criteria

good luck!