i would liketo ask if an above average student like me ….who hasn’t participated in olympiads and all so much can crack iit with good rank? like i am smart enough but just never did so well in olympiads in class 9^th and 10^th.

@ rushiklesh 
yes , for sure u can . beacuse olympiad donot have any relation with jee mainj and advanced . 
olympiad is just recommended to student only for checking their grasp on maths and science subject and also bring them to a competetive enviornment , 
if u have not appeared that then no problem . 
just work hard now and do solve as many ques as u can , attempt mock test , get all india rank , then jus=dge your weak point . 
and always bounce back to the next test . 
that will help u , and remember – not to repeat the mistake in any test . 
u can take help of askiitian self study package also , they are great , 

ALL THE BEST ..

yeah obviously you can crack. After coming in 11^th from the first day u should be dedicated to study especially numericals. Practise them more and surely you can crack.