sir i m in 12th right now and in next year 2020 i want to prepare for iit jee and i m a average student then which ibstitute will suppirt me for better of me allen kota or fitjee delahi , i m saying this because most of coaching teacher only focus on good student so plz tell me

Dear Vaishnavi, if you want to choose from these two then my advice would be to choose ALLEN KOTA. There are many reason for chosing this one.
First of all its very much true that coaching institutes generally focus on good students as they want top rankers from their coaching institutes. But it hardly matters as it's your hardwork that matters at the end. If you join ALLEN KOTA then due to high competition you will also try to give your best. This healthy competition many times improves students' performances. Being an average student you might feel that your level is below others. But constant hardwork is what they demand in KOTA. Joining FITJEE is not a good option as they will put you in the last batches where they start with advance level. I know my friends who dropped last year and joined FITJEE but ended up joining private engineering colleges.
If you truly want to devote your one year then devoting to the best place makes a huge difference rather than just paying fees and doing nothing at the other place.
All the best
Hope this helps