Abstract:
Knowledge of probability is perceived as valuable in the 21st century. This
knowledge enables people to understand and make informed decisions relating to
uncertain events that occur in real life. Hence, many educational authorities have
considered the inclusion of the teaching of probability important in their school
curricula. This study investigated Grade 12 students’ proficiency in solving
probability problems using contingency tables and tree diagrams as aids. This
study employed cross-sectional survey research design, and a mixed method
research approach. Data was collected from 342 secondary school students who
were conveniently selected from six schools in the KwaZulu-Natal province in
South Africa using an achievement test. The study revealed that most of the
students (97% and 91%) scored below 50% in solving probability problems
involving the use of tree diagrams and contingency tables respectively. The
findings show that the students were not proficient in the use of tree diagrams and
contingency tables to solve probability problems. The implications of the findings
of this study for teacher training and professional development, and textbook
publication are discussed and recommendations made.
