The provided pie charts depict the breakdown of class types in primary schools across four distinct regions in Australia during the year 2010. Overall, classes with 21-25 students constituted the majority, with the only exception being South Australia, where classes with fewer than 20 students were the most prevalent. It is noteworthy that classes with over 30 students were the least favored across all states in 2010. Upon closer examination, it becomes apparent that in New South Wales, the highest percentage of primary-level classes fell within the 21-25 student range, making up 37%. In stark contrast, South Australia exhibited a higher preference for classes with fewer than 20 students, comprising 36%, while in New South Wales, this category accounted for 26%. The proportion of classes accommodating 26-30 students in New South Wales and South Australia showed a slight difference, with figures of 33% and 28%, respectively. Notably, the largest class size in both regions only represented a mere 4%. Furthermore, a substantial portion of class sizes in the Australian Capital Territory and Western Australia fell within the 21-25 student range, with the former holding a slightly larger proportion at 42%. There was a notable contrast in the distribution of classes with under 20 students and those with 26-30 students in the Australian Capital Territory, with figures of 38% and 10%, respectively. In Western Australia, however, both categories accounted for approximately 26%. Importantly, classes with more than 30 students in both Australian regions remained below 5%.