how will i get chance in london school of economics at masters?

HI, you have not given any details about your educational and professional profile which would have helped in assessing your current situation. to get admission in a reputed institution like LSE on need to have a good educational background as in a good percentage from a well reputed University in I

It is ranked amongst the best institutions in the world for economics and political science. You should have a high first class degree (atleast) in the relevant subject. Also a very good IELTS score.