I didn't learned 11th as iit aspirant can i study 11th again?is there any chance

Hello aspirant....
For Jee advanced and Jee mains candidate will have to read 11th and 12th both.Questions are asked from both the years.The weightage of 11th and 12th is nearly same.One cannot score good marks without reading 11th.If you have not read in 11th then there is problem in many chapters of 12th also.Many chapters are linked to each other.The best suggestion is you should drop.Then you should study and make preparation for this.
Hope you get it.