Your best place to find 2012 past papers of principles of commerce 11th class from bise lahore board. These old up to date papers can be downloaded or viewed online.
Principles of Commerce Past Papers 2012 Lahore Board
2012 Principles of commerce Past Papers 11th Class BISE Lahore Board Analysis
Campus.pk gives you unique insight into each past paper about what are the top chapters and topics.
Principles-of-commerce Past Papers 11th Class BISE Lahore Board