In teaching mathematics, we encounter visual models in taking new curriculum frequently. In our paper, we focus on Multiplication rule in probability using two visual models: tree diagram and tangram. First, we introduce the topic and we analyze occurrence of visual models in selected textbooks of mathematics for high schools. The main part of the paper is devoted to the analysis of the percentage of correct solutions of probability problems using visual model. According to the visual model, we analyze two worksheet tasks. Regarding to the Multiplication rule in probability, we discuss pupil’s solutions of „tree diagram“ worksheet firstly and „tangram“ worksheet secondly. Our analysis has shown that pupils achieved better learning outcomes when they worked with the visual model „tree diagram“.