Below is the chapter wise weightage of maths in WBJEE

Vectors (7%)

Probability (7%)

Three-Dimensional Geometry (6%)

Matrices Determinants (5%)

Limits (5%)

Indefinite Integration (5%)

Sets, Relations & Functions (5%)

Definite Integration (5%)

Theory of Equations (4%)

Permutation & Combination (4%)

Complex Numbers (4%)

Good Luck!!

You can consider below detail -

Vectors - 7% questions

Probability - 7% questions

Three Dimensional Geometry -  6% questions

Matrices Determinants -  5% questions

Limits - 5% questions

Indefinite Integration -  5% questions

Sets, Relations and Functions - 5% questions

Definite Integration - 5% questions

Theory of Equations -  4% questions

Permutation and Combination -  4% questions

Complex Numbers - 4% questions

Straight Lines - 3% questions

Parabola - 3% questions

Continuity and Differentiability -  3% questions

Differential Equation - 3% questions

Circles - 3% questions

Binomial Theorem - 3% questions

Dynamics - 3% questions

Pairs of Straight Lines - 3% questions

Sequences and Series - 3% questions

Trigonometric Ratios and Identities - 3% questions

Statistics - 3% questions
Ellipse - 2% questions

Inverse Trigonometry - 2% questions

Hyperbola - 2% questions

Trigonometric Equations - 2% questions

Heights and Distances - 1% questions

Mathematical Induction - 1% questions

Application of Derivatives - 1% questions

Exponentials and Logarithms - 1% questions

Differential Coefficient - 1% questions

Hope this helps!!!