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The proposed publication is a part of the educational and methodological set Algebra. 9th grade", created on the basis of the textbook by N. Prokopenko, Y. Zakhariychenko, N. Kinashchuk, and contains educational material on the topic "Fundamentals of combinatorics, probability theory and statistics".

The structure and content of the publication allows you to use it when working with any existing algebra textbook for the 9th grade of general secondary education institutions.