Maths - 100 marks (75 questions with 2 hours time) and Physics & Chemistry - 100 marks (80 questions with 2 hours time).
An extra piece of advice, please try to search for official website rather than relying on some strangers' answer.
All the best. Crack WBJEE 2018 in style.
WBJEE 2019 College Predictor
Know your admission chances for colleges based on WBJEE Rank