Is it possible to clear the UPSC for an average student?

yes it is possible,there are many examples of those people who have done this and there are many examples of those students who have been toppers in IITs and IIMs and still have failed to clear UPSC.there is no secret formula for succeeding in UPSC no perfect strategy and no perfect student, only your hardwork will make you beat UPSC .

Absolutely.

It is possible to prepare for UPSC CSE without coaching and many people have done it over the years.

But I think one’s decision about joining coaching should not be based on whether it is possible or not. It should be a purely personal decision based on the analysis of one’s strengths and weaknesses.

In an exam like CSE what works for one might not work for another. So answer to this question must be sought within ourselves. Ask yourself if it is possible to prepare for UPSC CSE without coaching. If you feel fairly confident then go ahead and prepare on your own. If not, then do whatever it takes to gain confidence. Coaching, mocks, study circles, whatever it takes.

However, if circumstances prevent you from joining a coaching class even when you feel the need, then please do not feel disheartened. Internet is a great equalizer and there are many people in the exact same situation as yours who have utilized this great resource to secure a good rank.

In my opinion, the key is confidence. If you think you are well equipped then you indeed are. Bhausaheb Damale sir Ahmadnagar 

Definitely No. A person studying for UPSC should strive hard in topics like Polity, Quants, History, Geography, and many more. He should have a killer instinct to get through the papers.He should expertise the skill of analytical thinking. With constant MOTIVATION and STRATEGIC PLANNING one can clear the exam at ease.