The aim of this paper is to analyze the changes in students’ academic performance in mathematical subjects like Probability Theory and Mathematical Statistics at Riga Technical University after the evaluation system reform in 2017. Students’ grades in Probability Theory and Mathematical Statistics for the period of four academic years between 2015 and 2019 have been analyzed using statistical methods. The findings show that reducing the share of the exam in the final grade has motivated students to study harder during the semester but has not had a significant impact on their performance on the exam.