Like the other two subjects of JEE Main syllabus 2020 - Physics and Chemistry, the Mathematics section of JEE Main 2020 will be of 120 marks (30 questions of 4 marks each). However, for any question answered incorrectly, one mark will be deducted. In 2018, the highest weightage in Mathematics was given to chapters like sequence and series, straight lines, 3D, Determinant, etc. Check out the detailed JEE Main 2019 syllabus for Mathematics
JEE Maths