Hello,

you can expect 2-3 questions. probability is also related to permutation and combination. so it can be a mixed question too. It is hard to get the accurate number. paper is set by the board and no one knows what will come until paper is distributed in the exam hall.

Keep on preparing. Solve as many questions you can. Appear mock tests. solve previous year papers. Check your performance and work to improve weak sections.

Hope it helps!